[Clang] Remove use after move of lambda (llvm#136728)

Static analysis flagged this use after move. It is undefined behavior
and I don't see any possible performance gains here to attempt to do
anything else but simply remove it.

Author: shafik

clang/lib/Basic/DiagnosticIDs.cpp

@@ -705,7 +705,7 @@ static void forEachSubGroupImpl(const WarningOption *Group, Func func) {
   for (const int16_t *SubGroups = DiagSubGroups + Group->SubGroups;
        *SubGroups != -1; ++SubGroups) {
     func(static_cast<size_t>(*SubGroups));
-    forEachSubGroupImpl(&OptionTable[*SubGroups], std::move(func));
+    forEachSubGroupImpl(&OptionTable[*SubGroups], func);
   }
 }