[repo] Remove docuaction workflow

This action has disappeared.

Author: andrewnicols

.github/workflows/test-deploy.yml

@@ -21,8 +21,5 @@ jobs:
       - name: Install dependencies
         run: yarn install --immutable
 
-      - name: Docusaurus cache
-        uses: docuactions/[email protected]
-
       - name: Test build website
         run: yarn build