[libc][newhdrgen] Remove shebangs in files other than yaml_to_classes.py (#101816)

None of the Python files were committed with the executable bit set, and
only yaml_to_classes.py was intended to be executed.

Also sets the executable bit on yaml_to_classes.py and changes the
shebang to run python3 instead of python.

Author: overmighty

libc/newhdrgen/class_implementation/classes/enumeration.py

@@ -1,5 +1,3 @@
-#!/usr/bin/env python
-#
 # ====-- Enumeration class for libc function headers ----------*- python -*--==#
 #
 # Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

libc/newhdrgen/class_implementation/classes/function.py

@@ -1,5 +1,3 @@
-#!/usr/bin/env python
-#
 # ====-- Function class for libc function headers -------------*- python -*--==#
 #
 # Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

libc/newhdrgen/class_implementation/classes/macro.py

@@ -1,5 +1,3 @@
-#!/usr/bin/env python
-#
 # ====-- Macro class for libc function headers ----------------*- python -*--==#
 #
 # Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

libc/newhdrgen/class_implementation/classes/object.py

@@ -1,5 +1,3 @@
-#!/usr/bin/env python
-#
 # ====-- Object class for libc function headers ---------------*- python -*--==#
 #
 # Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

libc/newhdrgen/class_implementation/classes/type.py

@@ -1,5 +1,3 @@
-#!/usr/bin/env python
-#
 # ====-- Type class for libc function headers -----------------*- python -*--==#
 #
 # Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

libc/newhdrgen/gpu_headers.py

@@ -1,5 +1,3 @@
-#!/usr/bin/env python
-#
 # ===- GPU HeaderFile Class for --export-decls version --------*- python -*--==#
 #
 # Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

libc/newhdrgen/header.py

@@ -1,5 +1,3 @@
-#!/usr/bin/env python
-#
 # ====- HeaderFile Class for libc function headers  -----------*- python -*--==#
 #
 # Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

libc/newhdrgen/yaml_to_classes.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # ===- Generate headers for libc functions  -------------------*- python -*--==#
 #