Revert "Add support to -Wa,--version in clang"

This reverts commit 3cc3c0f.

Breaks non-linux platforms.

https://reviews.llvm.org/D99556#2662706
Signed-off-by: Nick Desaulniers <[email protected]>

Author: nickdesaulniers

clang/lib/Driver/ToolChains/Clang.cpp

@@ -2549,8 +2549,6 @@ static void CollectArgsForIntegratedAssembler(Compilation &C,
         // -fdebug-compilation-dir (without '=') here.
         CmdArgs.push_back("-fdebug-compilation-dir");
         CmdArgs.push_back(Value.data());
-      } else if (Value == "--version") {
-        D.PrintVersion(C, llvm::outs());
       } else {
         D.Diag(diag::err_drv_unsupported_option_argument)
             << A->getOption().getName() << Value;