Remove out-of-dated hack (#348)

Faulty code was fixed in llvm/llvm-project@6d2b75e

Signed-off-by: Haonan Yang <[email protected]>

Author: haonanya1

common_clang.cpp

@@ -258,9 +258,6 @@ Compile(const char *pszProgramSource, const char **pInputHeaders,
       compiler->createFileManager(OverlayFS);
       compiler->createSourceManager(compiler->getFileManager());
 
-      // Calling ResetAllOptionOccurrences as WA for issue from here:
-      // https://reviews.llvm.org/D66324?id=219733#1680231
-      llvm::cl::ResetAllOptionOccurrences();
       // Create compiler invocation from user args before trickering with it
       clang::CompilerInvocation::CreateFromArgs(compiler->getInvocation(),
           optionsParser.args(), *Diags);