[NFC] Remove Python 2 imports from __future__

The `__future__` we relied on is now,  where the 3 specific things are
all included [since Python 3.0](https://docs.python.org/3/library/__future__.html):

* absolute_import
* print_function
* unicode_literals

These import statements are no-ops and are no longer necessary.

Author: dduan

benchmark/scripts/build_script_helper.py

@@ -1,7 +1,5 @@
 #!/usr/bin/env python
 
-from __future__ import print_function
-
 import argparse
 import os
 import shutil

benchmark/scripts/compare_perf_tests.py

@@ -27,8 +27,6 @@ class `ReportFormatter` creates the test comparison report in specified format.
 
 """
 
-from __future__ import print_function
-
 import argparse
 import functools
 import re

benchmark/scripts/generate_harness/generate_harness.py

@@ -14,8 +14,6 @@
 
 # Generate boilerplate, CMakeLists.txt and utils/main.swift from templates.
 
-from __future__ import print_function
-
 import argparse
 import os
 import subprocess

benchmark/scripts/perf_test_driver/perf_test_driver.py

@@ -12,8 +12,6 @@
 #
 # ===---------------------------------------------------------------------===//
 
-from __future__ import print_function
-
 import functools
 import glob
 import multiprocessing

benchmark/scripts/run_smoke_bench

@@ -21,8 +21,6 @@
 #
 # ===---------------------------------------------------------------------===//
 
-from __future__ import print_function
-
 import argparse
 import glob
 import os

benchmark/utils/convertToJSON.py

@@ -57,8 +57,6 @@
 #     ]
 # }
 
-from __future__ import print_function
-
 import json
 import re
 import sys

docs/scripts/ns-html2rst

@@ -1,6 +1,4 @@
 #!/usr/bin/env python
-from __future__ import print_function
-
 import re
 import subprocess
 import sys

test/CrossImport/Inputs/rewrite-module-triples.py

@@ -4,8 +4,6 @@
 the indicated module triples instead.
 """
 
-from __future__ import print_function
-
 import os
 import platform
 import shutil

test/Driver/Dependencies/Inputs/fake-build-for-bitcode.py

@@ -16,8 +16,6 @@
 #
 # ----------------------------------------------------------------------------
 
-from __future__ import print_function
-
 import os
 import sys
 

test/Driver/Dependencies/Inputs/fake-build-whole-module.py

@@ -15,8 +15,6 @@
 #
 # ----------------------------------------------------------------------------
 
-from __future__ import print_function
-
 import os
 import sys
 

test/Driver/Dependencies/Inputs/modify-non-primary-files.py

@@ -16,8 +16,6 @@
 #
 # ----------------------------------------------------------------------------
 
-from __future__ import print_function
-
 import os
 import sys
 

test/Driver/Dependencies/Inputs/update-dependencies-bad.py

@@ -17,8 +17,6 @@
 #
 # ----------------------------------------------------------------------------
 
-from __future__ import print_function
-
 import os
 import shutil
 import signal

test/Driver/Dependencies/Inputs/update-dependencies.py

@@ -27,8 +27,6 @@
 #
 # ----------------------------------------------------------------------------
 
-from __future__ import print_function
-
 import os
 import shutil
 import subprocess

test/Driver/Inputs/fake-toolchain/clang

@@ -11,6 +11,4 @@
 #
 # ----------------------------------------------------------------------------
 
-from __future__ import print_function
-
 print("Sorry, I'm lazy-clang")

test/Driver/Inputs/fake-toolchain/ld

@@ -11,6 +11,4 @@
 #
 # ----------------------------------------------------------------------------
 
-from __future__ import print_function
-
 print("Sorry, wrong number!")

test/Driver/Inputs/filelists/check-filelist-abc.py

@@ -11,8 +11,6 @@
 #
 # ----------------------------------------------------------------------------
 
-from __future__ import print_function
-
 import os
 import sys
 

test/Driver/Inputs/filelists/fake-ld.py

@@ -11,8 +11,6 @@
 #
 # ----------------------------------------------------------------------------
 
-from __future__ import print_function
-
 import sys
 
 filelistFile = sys.argv[sys.argv.index('-filelist') + 1]

test/Incremental/Verifier/gen-output-file-map.py

@@ -1,7 +1,5 @@
 #!/usr/bin/env python
 
-from __future__ import print_function
-
 import argparse
 import io
 import json

test/Inputs/getmtime.py

@@ -1,7 +1,5 @@
 #!/usr/bin/env python
 
-from __future__ import print_function
-
 import os
 import sys
 

test/RemoteMirror/Inputs/interop.py

@@ -7,8 +7,6 @@
 #
 # Invoke by passing the various Swift build directories as parameters.
 
-from __future__ import print_function
-
 import itertools
 import os
 import subprocess

test/attr/Inputs/access-note-gen.py

@@ -6,8 +6,6 @@
 the originals in the process.
 """
 
-from __future__ import print_function
-
 import io
 import re
 import sys

tools/swift-inspect/build_script_helper.py

@@ -1,7 +1,5 @@
 #!/usr/bin/env python
 
-from __future__ import print_function
-
 import argparse
 import os
 import subprocess

utils/80+-check

@@ -1,8 +1,6 @@
 #!/usr/bin/env python
 
 
-from __future__ import print_function, unicode_literals
-
 import argparse
 import sys
 

utils/PathSanitizingFileCheck

@@ -9,8 +9,6 @@
 # See https://swift.org/LICENSE.txt for license information
 # See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
 
-from __future__ import print_function
-
 import argparse
 import io
 import re

utils/android/adb/commands.py

@@ -15,8 +15,6 @@
 #
 # ----------------------------------------------------------------------------
 
-from __future__ import print_function
-
 import os
 import subprocess
 import tempfile

utils/android/adb_push_built_products/main.py

@@ -15,8 +15,6 @@
 #
 # ----------------------------------------------------------------------------
 
-from __future__ import print_function
-
 import argparse
 import glob
 import os

utils/android/adb_test_runner/main.py

@@ -17,8 +17,6 @@
 #
 # ----------------------------------------------------------------------------
 
-from __future__ import print_function
-
 import os
 import sys
 

utils/api_checker/sdk-module-lists/infer-imports.py

@@ -1,7 +1,5 @@
 #!/usr/bin/env python -u
 
-from __future__ import print_function
-
 import os
 import sys
 

utils/api_checker/swift-api-checker.py

@@ -1,7 +1,5 @@
 #!/usr/bin/env python3
 
-from __future__ import print_function
-
 import argparse
 import os
 import subprocess

utils/apply-fixit-edits.py

@@ -9,8 +9,6 @@
 # See https://swift.org/LICENSE.txt for license information
 # See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
 
-from __future__ import print_function
-
 import argparse
 import collections
 import json

utils/bug_reducer/bug_reducer/func_bug_reducer.py

@@ -1,5 +1,3 @@
-from __future__ import print_function
-
 import md5
 import os
 import sys

utils/bug_reducer/bug_reducer/list_reducer.py

@@ -1,5 +1,3 @@
-from __future__ import print_function
-
 import random
 
 TESTRESULT_NOFAILURE = "NoFailure"

utils/bug_reducer/bug_reducer/opt_bug_reducer.py

@@ -1,5 +1,3 @@
-from __future__ import print_function
-
 import json
 import md5
 import subprocess

utils/bug_reducer/bug_reducer/random_bug_finder.py

@@ -1,5 +1,3 @@
-from __future__ import print_function
-
 import json
 import random
 import subprocess

utils/bug_reducer/bug_reducer/swift_tools.py

@@ -1,5 +1,3 @@
-from __future__ import print_function
-
 import os
 import subprocess
 

utils/build-tooling-libs

@@ -23,8 +23,6 @@
 # This utility also provides capability to gather profile data and build the parser
 # library with PGO optimization enabled.
 
-from __future__ import print_function
-
 import copy
 import multiprocessing
 import os

utils/build_swift/build_swift/constants.py

@@ -6,11 +6,6 @@
 # See https://swift.org/LICENSE.txt for license information
 # See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
 
-
-from __future__ import absolute_import
-from __future__ import print_function
-from __future__ import unicode_literals
-
 import os.path
 
 

utils/chex.py

@@ -4,8 +4,6 @@
 # strings matching the regex /< (i[0-9]+) \s+ (0x[0-9A-Fa-f]+) >/x with the
 # decimal literal equivalent that would really appear in printed LLVM IR.
 
-from __future__ import print_function
-
 import re
 import sys
 

utils/cmpcodesize/cmpcodesize/compare.py

@@ -8,8 +8,6 @@
 # See https://swift.org/LICENSE.txt for license information
 # See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
 
-from __future__ import print_function
-
 import collections
 import os
 import re

utils/cmpcodesize/cmpcodesize/main.py

@@ -9,8 +9,6 @@
 # See https://swift.org/LICENSE.txt for license information
 # See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
 
-from __future__ import print_function
-
 import argparse
 import collections
 import csv

utils/coverage/coverage-touch-tests

@@ -9,8 +9,6 @@
 # See https://swift.org/LICENSE.txt for license information
 # See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
 
-from __future__ import print_function
-
 import argparse
 import logging
 import multiprocessing

utils/dev-scripts/blockifyasm

@@ -22,8 +22,6 @@
 #
 # ----------------------------------------------------------------------------
 
-from __future__ import print_function
-
 import re
 import sys
 from collections import defaultdict

utils/dev-scripts/split-cmdline

@@ -36,8 +36,6 @@
 #
 # ----------------------------------------------------------------------------
 
-from __future__ import print_function
-
 import os
 import re
 import shlex

utils/gyb.py

@@ -2,8 +2,6 @@
 # GYB: Generate Your Boilerplate (improved names welcome; at least
 # this one's short).  See -h output for instructions
 
-from __future__ import print_function
-
 import io
 import os
 import re

utils/gyb_syntax_support/Node.py

@@ -1,4 +1,3 @@
-from __future__ import print_function
 import sys  # noqa: I201
 
 from .kinds import SYNTAX_BASE_KINDS, kind_to_type, lowercase_first_word

utils/incrparse/incr_transfer_round_trip.py

@@ -1,7 +1,5 @@
 #!/usr/bin/env python
 
-from __future__ import print_function
-
 import argparse
 import os
 import subprocess

utils/incrparse/test_util.py

@@ -1,7 +1,5 @@
 #!/usr/bin/env python
 
-from __future__ import print_function
-
 import argparse
 import io
 import os