Fix gifs

Gifs are not shown at https://teklia.gitlab.io/atr/dan/usage/predict/#description-of-parameters

.gitlab-ci.yml

@@ -61,8 +61,6 @@ test:
 
   before_script:
     - pip install -e .[docs]
-    # Fetch Gif images
-    - git lfs pull --include docs/assets/
 
   script:
     - mkdocs build --strict --verbose