refactor: slash-and-burn Word Cloud BuiltIn XBlock

Removes the built-in Word Cloud XBlock and all associated assets now that
USE_EXTRACTED_WORD_CLOUD_BLOCK has been True, making xblocks_contrib the
active implementation.

- Remove USE_EXTRACTED_WORD_CLOUD_BLOCK toggle from common.py
- Remove word_cloud entrypoint from pyproject.toml
- Delete xmodule/word_cloud_block.py (built-in class + shim)
- Delete xmodule/assets/word_cloud/ (JS assets including D3 vendor libs
  and custom webpack config)
- Delete lms/templates/word_cloud.html
- Delete xmodule/static/css-builtin-blocks/WordCloudBlockDisplay.css
- Remove WordCloudBlockDisplay/WordCloudBlockEditor webpack entries from
  webpack.builtinblocks.config.js and webpack.common.config.js
- Delete xmodule/tests/test_word_cloud.py and
  lms/djangoapps/courseware/tests/test_word_cloud.py

Closes openedx/public-engineering#534

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: 2 people

lms/djangoapps/courseware/tests/test_word_cloud.py

@@ -2059,14 +2059,6 @@ def add_optional_apps(optional_apps, installed_apps):
 #
 # Ticket: https://github.com/openedx/edx-platform/issues/35308
 
-# .. toggle_name: USE_EXTRACTED_WORD_CLOUD_BLOCK
-# .. toggle_default: True
-# .. toggle_implementation: DjangoSetting
-# .. toggle_description: Enables the use of the extracted Word Cloud XBlock, which has been shifted to the 'openedx/xblocks-contrib' repo.
-# .. toggle_use_cases: temporary
-# .. toggle_creation_date: 2024-11-10
-# .. toggle_target_removal_date: 2026-04-10
-USE_EXTRACTED_WORD_CLOUD_BLOCK = True
 
 # .. toggle_name: USE_EXTRACTED_ANNOTATABLE_BLOCK
 # .. toggle_default: True

lms/templates/word_cloud.html

@@ -46,7 +46,6 @@ vertical = "xmodule.vertical_block:VerticalBlock"
 video = "xmodule.video_block:VideoBlock"
 videoalpha = "xmodule.video_block:VideoBlock"
 videodev = "xmodule.template_block:TranslateCustomTagBlock"
-word_cloud = "xmodule.word_cloud_block:WordCloudBlock"
 wrapper = "xmodule.wrapper_block:WrapperBlock"
 
 [project.entry-points."xblock_asides.v1"]

openedx/envs/common.py

@@ -82,13 +82,5 @@ module.exports = {
         VideoBlockDisplay: [
             './xmodule/assets/video/public/js/10_main.js'
         ],
-        WordCloudBlockDisplay: [
-            './xmodule/js/src/xmodule.js',
-            './xmodule/assets/word_cloud/src/js/word_cloud.js'
-        ],
-        WordCloudBlockEditor: [
-            './xmodule/js/src/xmodule.js',
-            './xmodule/js/src/raw/edit/metadata-only.js'
-        ]
     }
 };