[core] Warning > 20

This reverts commit 84ab54c4bc.

src/frontend_common/firmware_manager.cpp

@@ -130,9 +130,9 @@ FirmwareManager::FirmwareCheckResult FirmwareManager::VerifyFirmware(Core::Syste
         }
 
         // TODO: update this whenever newer firmware is properly supported
-        /* if (firmware_data.major > 19) {
+        if (firmware_data.major > 20) {
             return ErrorFirmwareTooNew;
-        } */
+        }
     }
 
     return FirmwareGood;