diff --git a/core/blockly.ts b/core/blockly.ts
index 759caa2c0..0415ee389 100644
--- a/core/blockly.ts
+++ b/core/blockly.ts
@@ -14,17 +14,6 @@
  */
 
 
-// Unused import preserved for side-effects. Remove if unneeded.
-import './events/events_block_create';
-// Unused import preserved for side-effects. Remove if unneeded.
-import './events/workspace_events';
-// Unused import preserved for side-effects. Remove if unneeded.
-import './events/events_ui';
-// Unused import preserved for side-effects. Remove if unneeded.
-import './events/events_ui_base';
-// Unused import preserved for side-effects. Remove if unneeded.
-import './events/events_var_create';
-
 import {Block} from './block';
 import * as blockAnimations from './block_animations';
 import {BlockDragSurfaceSvg} from './block_drag_surface';
diff --git a/core/extensions.ts b/core/extensions.ts
index 8cbe6015d..2f0632319 100644
--- a/core/extensions.ts
+++ b/core/extensions.ts
@@ -20,9 +20,6 @@
  */
 
 
-// Unused import preserved for side-effects. Remove if unneeded.
-import './mutator';
-
 import type {Block} from './block';
 import {BlockSvg} from './block_svg';
 import {FieldDropdown} from './field_dropdown';