[Sema] Remove unneeded call to LookupResult::resolveKind

[trixirt]

Summary

From code inspection it was noticed that CppNamespaceLookup's
caller CppLookupName calls LookupResult::resolveKind when
CppNamespaceLookup was successful or had an earlier success.

lib/Sema/SemaLookup.cpp

CppNamespaceLookup(Sema &S, LookupResult &R, ASTContext &Context,
   bool Found = LookupDirect(S, R, NS);
 
   // Perform direct name lookup into the namespaces nominated by the
   // using directives whose common ancestor is this namespace.
   for (const UnqualUsingEntry &UUE : UDirs.getNamespacesFor(NS))
     if (LookupDirect(S, R, UUE.getNominatedNamespace()))
       Found = true;
 
-  R.resolveKind();
+  // Defer resolution to the caller.
 
   return Found;
 }
 
 static bool isNamespaceOrTranslationUnitScope(Scope *S) {
   if (DeclContext *Ctx = S->getEntity())
     return Ctx->isFileContext();
   return false;