test: enable CAS tests on Windows

Enable the CAS test suite to execute on Windows.

Author: compnerd

test/CAS/lit.local.cfg

@@ -12,7 +12,3 @@ if get_target_os() in ('windows-msvc',):
     config.substitutions.insert(0, (r'%plugin\(([^)]+)\)', SubstituteCaptures(os.path.join(config.llvm_tools_dir, r'%target-library-name(\1)'))))
 else:
     config.substitutions.insert(0, (r'%plugin\(([^)]+)\)', SubstituteCaptures(os.path.join(config.llvm_libs_dir, r'%target-library-name(\1)'))))
-
-import platform
-if platform.system() == 'Windows':
-    config.unsupported = True