Remove check for sk-stress-test

If sk-stress-test, sk-swiftc-wrapper and swift-evolve are no longer installed into the toolchain, we shouldn't test that they work properly.

rdar://85079653

Author: ahoppen

lit.cfg

@@ -252,16 +252,3 @@ else:
 for name in ('swift-build', 'FileCheck', 'readelf'):
   config.substitutions.append((' {0} '.format(name),
                                ' unquoted-command-name-{0} '.format(name)))
-
-# Add substitutions for SourceKit stress tester executables
-sk_stress_test_path = lit_config.params.get(
-    "sk-stress-test",
-    os.path.join(package_path, "usr", "bin", "sk-stress-test"))
-sk_swiftc_wrapper_path = lit_config.params.get(
-    "sk-swiftc-wrapper",
-    os.path.join(package_path, "usr", "bin", "sk-swiftc-wrapper"))
-
-lit_config.note("testing using 'sk-stress-test': {}".format(sk_stress_test_path))
-lit_config.note("testing using 'sk-swiftc-wrapper': {}".format(sk_swiftc_wrapper_path))
-config.substitutions.append( ('%{sk-stress-test}', sk_stress_test_path) )
-config.substitutions.append( ('%{sk-swiftc-wrapper}', sk_swiftc_wrapper_path) )