no cache in docs CI

Author: jgreener64

.github/workflows/CI.yml

@@ -50,7 +50,6 @@ jobs:
       - uses: julia-actions/setup-julia@v2
         with:
           version: '1'
-      - uses: julia-actions/cache@v2
       - run: |
           julia --project=docs -e '
             using Pkg