chore: Remove the keyboard-navigation plugin from the advanced playground (#9670)

Author: gonfunko

package-lock.json

@@ -105,7 +105,6 @@
   "devDependencies": {
     "@blockly/block-test": "^7.0.2",
     "@blockly/dev-tools": "^9.0.2",
-    "@blockly/keyboard-navigation": "^3.0.1",
     "@blockly/theme-modern": "^7.0.1",
     "@hyperjump/browser": "^1.1.4",
     "@hyperjump/json-schema": "^1.5.0",

packages/blockly/package.json

@@ -18,9 +18,6 @@
       await loadScript(
         '../../node_modules/@blockly/theme-modern/dist/index.js',
       );
-      await loadScript(
-        '../../node_modules/@blockly/keyboard-navigation/dist/index.js',
-      );
 
       let kbNavigation;
 
@@ -52,28 +49,6 @@
             // Refresh theme.
             ws.setTheme(ws.getTheme());
           });
-
-        // Keyboard navigation options.
-        const kbOptions = {
-          'Enable keyboard navigation': false,
-        };
-        gui.remember(kbOptions);
-        gui.add(kbOptions, 'Enable keyboard navigation').onChange((enabled) => {
-          setupKeyboardNav(enabled, playground);
-        });
-
-        // Set up keyboard navigation on page load
-        setupKeyboardNav(kbOptions['Enable keyboard navigation'], playground);
-      }
-
-      function setupKeyboardNav(enabled, playground) {
-        if (enabled) {
-          kbNavigation = new KeyboardNavigation(playground.getWorkspace());
-        } else {
-          if (kbNavigation) {
-            kbNavigation.dispose();
-          }
-        }
       }
 
       function initPlayground() {
@@ -128,8 +103,6 @@
         };
 
         Blockly.ContextMenuItems.registerCommentOptions();
-        KeyboardNavigation.registerKeyboardNavigationStyles();
-        // TODO: register the navigation-deferring toolbox.
 
         createPlayground(
           document.getElementById('root'),