Revert "[Clang][Driver] Warn about -c/-S with -fsyntax-only" (#100052)

Reverts #98607

The test added was failing on some build bots:
- https://lab.llvm.org/buildbot/#/builders/144/builds/2918
- https://lab.llvm.org/buildbot/#/builders/46/builds/2069

Author: dyung

clang/lib/Driver/ToolChains/Clang.cpp

@@ -794,6 +794,10 @@ static void addPGOAndCoverageFlags(const ToolChain &TC, Compilation &C,
       Args.hasArg(options::OPT_coverage))
     FProfileDir = Args.getLastArg(options::OPT_fprofile_dir);
 
+  // TODO: Don't claim -c/-S to warn about -fsyntax-only -c/-S, -E -c/-S,
+  // like we warn about -fsyntax-only -E.
+  (void)(Args.hasArg(options::OPT_c) || Args.hasArg(options::OPT_S));
+
   // Put the .gcno and .gcda files (if needed) next to the primary output file,
   // or fall back to a file in the current directory for `clang -c --coverage
   // d/a.c` in the absence of -o.