core: Remove unnecessary enum casts in log calls

Follows the video core PR. fmt doesn't require casts for enum classes
anymore, so we can remove quite a few casts.

src/core/hle/service/service.cpp

@@ -181,7 +181,7 @@ ResultCode ServiceFrameworkBase::HandleSyncRequest(Kernel::HLERequestContext& co
         break;
     }
     default:
-        UNIMPLEMENTED_MSG("command_type={}", static_cast<int>(context.GetCommandType()));
+        UNIMPLEMENTED_MSG("command_type={}", context.GetCommandType());
     }
 
     context.WriteToOutgoingCommandBuffer(context.GetThread());