chore: remove all namespace comments (#6903)

* chore: remove all namespace comments

* chore: fix lint

core/internal_constants.ts

@@ -4,12 +4,6 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-/**
- * Module that provides constants for use inside Blockly. Do not
- * use these constants outside of the core library.
- *
- * @namespace Blockly.internalConstants
- */
 import * as goog from '../closure/goog/goog.js';
 goog.declareModuleId('Blockly.internalConstants');