Fix sphinx-gallery backlinks (#4565) (#4567)

Author: NicolasHug

.circleci/config.yml

@@ -911,15 +911,6 @@ jobs:
       - run:
           name: Install torchvision
           command: .circleci/unittest/linux/scripts/install.sh
-      - run:
-          name: Generate cache key
-          # This will refresh cache on Sundays, nightly build should generate new cache.
-          command: echo "$(date +"%Y-%U")" > .circleci-weekly
-      - restore_cache:
-          {% raw %}
-          keys:
-            - sphinx-gallery-{{ checksum "./docs/source/conf.py" }}-{{ checksum ".circleci-weekly" }}
-          {% endraw %}
       - run:
           name: Build docs
           command: |
@@ -932,12 +923,6 @@ jobs:
             pip install -r requirements.txt
             make html
             popd
-      - save_cache:
-          {% raw %}
-          key: sphinx-gallery-{{ checksum "./docs/source/conf.py" }}-{{ checksum ".circleci-weekly" }}
-          {% endraw %}
-          paths:
-            - ./docs/source/auto_examples
       - persist_to_workspace:
           root: ./
           paths: