[clang] [llvm] [NFC] Remove unused-but-set global variables (PR #189315)

[Matt Arsenault via cfe-commits]

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@@ -216,7 +215,7 @@ static void ParseArgs(int argc, char **argv) {
   if (const llvm::opt::Arg *A = Args.getLastArg(OPT_tu_buffer_path_EQ))
     TranslationUnitFile = A->getValue();
 
-  DeprecatedDriverCommand = Args.hasArg(OPT_deprecated_driver_command);
+  Args.hasArg(OPT_deprecated_driver_command);
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arsenm wrote:

This is leaving behind a no-op statement 

https://github.com/llvm/llvm-project/pull/189315