Revert r236001, "Disable clang-tools-extra/test/pp-trace/pp-trace-modules.cpp on win32 for now. Investigating."

It has been resolved.

llvm-svn: 236309

clang-tools-extra/test/pp-trace/pp-trace-modules.cpp

@@ -1,9 +1,6 @@
 // RUN: rm -rf %t
 // RUN: pp-trace -ignore FileChanged,MacroDefined %s -x objective-c++ -undef -target x86_64 -std=c++11 -fmodules -fcxx-modules -fmodules-cache-path=%t -I%S -I%S/Input | FileCheck --strict-whitespace %s
 
-// FIXME: It crashes on (at least) msc18. Investigating.
-// REQUIRES: shell
-
 // CHECK: ---
 
 @import Level1A;