Revert "Typecheck JS files for chrome://extensions"

chrome/browser/resources/extensions/extension_commands_overlay.js

Index: chrome/browser/resources/extensions/extension_commands_overlay.js
diff --git a/chrome/browser/resources/extensions/extension_commands_overlay.js b/chrome/browser/resources/extensions/extension_commands_overlay.js
index 7d2546d2f817334733140939fbc8eaea8c9114e3..64f595656508977690ddcec4a9466d32bbdd0275 100644
--- a/chrome/browser/resources/extensions/extension_commands_overlay.js
+++ b/chrome/browser/resources/extensions/extension_commands_overlay.js
@@ -51,8 +51,6 @@ cr.define('extensions', function() {
   /**
    * Called by the dom_ui_ to re-populate the page with data representing
    * the current state of extension commands.
-   * @param {!{commands: Array.<{name: string, id: string, commands: ?Array}>}}
-   *     extensionsData
    */
   ExtensionCommandsOverlay.returnExtensionsData = function(extensionsData) {
     ExtensionCommandList.prototype.data_ = extensionsData;
@@ -70,7 +68,7 @@ cr.define('extensions', function() {
       list.classList.add('empty-extension-commands-list');
     else
       list.classList.remove('empty-extension-commands-list');
-  };
+  }
 
   // Export
   return {