Remove "git lfs install" step rom pr-docs-check-container-raw.

Author: samsrabin

.github/workflows/pr-docs-check-container-raw.yml

@@ -8,5 +8,5 @@ jobs:
     container:
       image: escomp/base:latest
     steps:
-    - run: git lfs install && git lfs pull --exclude='' --include=''
+    - run: git lfs pull --exclude='' --include=''
     - run: sphinx-build -W --keep-going -n -b html . _build