Revert of [builtins] Migrate String.prototype.charCodeAt and String.prototype.charAt to TurboFan.

src/runtime/runtime-internal.cc

Index: src/runtime/runtime-internal.cc
diff --git a/src/runtime/runtime-internal.cc b/src/runtime/runtime-internal.cc
index d93ffdb846a8f2206031cce3002709deb4a3c18b..8a5bdeb60dc1ca292a58db550f0f5332fb94fdab 100644
--- a/src/runtime/runtime-internal.cc
+++ b/src/runtime/runtime-internal.cc
@@ -431,13 +431,6 @@
       isolate, NewTypeError(MessageTemplate::kCalledNonCallable, callsite));
 }
 
-RUNTIME_FUNCTION(Runtime_ThrowCalledOnNullOrUndefined) {
-  HandleScope scope(isolate);
-  DCHECK_EQ(1, args.length());
-  CONVERT_ARG_HANDLE_CHECKED(String, name, 0);
-  THROW_NEW_ERROR_RETURN_FAILURE(
-      isolate, NewTypeError(MessageTemplate::kCalledOnNullOrUndefined, name));
-}
 
 RUNTIME_FUNCTION(Runtime_ThrowConstructedNonConstructable) {
   HandleScope scope(isolate);