Don't allow user to override define_hardware in the robot.

Author: lizlooney

src/toolbox/methods_category.ts

@@ -63,12 +63,14 @@ export class MethodsCategory {
       switch (editor.getCurrentModuleType()) {
         case commonStorage.MODULE_TYPE_ROBOT:
           // TODO(lizlooney): We need a way to mark a method in python as not overridable.
-          // For example, in RobotBase, register_event_handler, unregister_event_handler,
-          // and fire_event should not be overridden in a user's robot.
+          // For example, in RobotBase, define_hardware, register_event_handler,
+          // unregister_event_handler, and fire_event should not be overridden in a user's robot.
           const methodNamesNotOverrideable: string[] = [
+            'define_hardware',
+            'fire_event',
+            'register_event_handler',
             'register_event_handler',
             'unregister_event_handler',
-            'fire_event',
           ];
           // Add the methods for a Robot.
           this.addClassBlocksForCurrentModule(