Revert "[AppleObjCRuntimeV2] Force lazily allocated class names to be resolved."

We're no longer convinced that this is needed and we have no test
coverage to disprove that. Backing out of this change until we're
convinced otherwise.

(cherry picked from commit 49c84fd)

Author: JDevlieghere

lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCRuntimeV2.cpp

@@ -1175,28 +1175,6 @@ AppleObjCRuntimeV2::GetClassDescriptorFromISA(ObjCISA isa) {
   return class_descriptor_sp;
 }
 
-static std::pair<bool, ConstString> ObjCGetClassNameRaw(
-                                      AppleObjCRuntime::ObjCISA isa,
-                                      Process *process) {
-  StreamString expr_string;
-  std::string input = std::to_string(isa);
-  expr_string.Printf("(const char *)objc_debug_class_getNameRaw(%s)",
-                     input.c_str());
-
-  ValueObjectSP result_sp;
-  EvaluateExpressionOptions eval_options;
-  eval_options.SetLanguage(lldb::eLanguageTypeObjC);
-  eval_options.SetResultIsInternal(true);
-  eval_options.SetGenerateDebugInfo(true);
-  eval_options.SetTimeout(process->GetUtilityExpressionTimeout());
-  auto eval_result = process->GetTarget().EvaluateExpression(
-      expr_string.GetData(),
-      process->GetThreadList().GetSelectedThread()->GetSelectedFrame().get(),
-      result_sp, eval_options);
-  ConstString type_name(result_sp->GetSummaryAsCString());
-  return std::make_pair(eval_result == eExpressionCompleted, type_name);
-}
-
 ObjCLanguageRuntime::ClassDescriptorSP
 AppleObjCRuntimeV2::GetClassDescriptor(ValueObject &valobj) {
   ClassDescriptorSP objc_class_sp;
@@ -1232,10 +1210,7 @@ AppleObjCRuntimeV2::GetClassDescriptor(ValueObject &valobj) {
     return objc_class_sp;
 
   objc_class_sp = GetClassDescriptorFromISA(isa);
-
-  if (objc_class_sp)
-    return objc_class_sp;
-  else {
+  if (isa && !objc_class_sp) {
     Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS |
                                       LIBLLDB_LOG_TYPES));
     LLDB_LOGF(log,
@@ -1244,13 +1219,6 @@ AppleObjCRuntimeV2::GetClassDescriptor(ValueObject &valobj) {
               "not in class descriptor cache 0x%" PRIx64,
               isa_pointer, isa);
   }
-
-  ClassDescriptorSP descriptor_sp(new ClassDescriptorV2(*this, isa, nullptr));
-  auto resolved = ObjCGetClassNameRaw(isa, process);
-  if (resolved.first == true) {
-    AddClass(isa, descriptor_sp, resolved.second.AsCString());
-    objc_class_sp = descriptor_sp;
-  }
   return objc_class_sp;
 }