This reverts commit 632a36bfcfc8273c1861f04ff6758d863c47c784.
Some targets such as Python 2.7.16 still use VERSION in
their builds. Without VERSION defined, the source code
has syntax errors.
I went ahead and committed your revert in r365992. Thanks!
Next time, please remove the clang/ from your patch
arc could not apply it:
Committing 'D64687: [clang] Revert "Remove __VERSION__"'... Revision includes changes to paths that do not exist: clang/docs/LanguageExtensions.rst