Remove staging thumbnails deployment (#3509)

Depends on https://github.com/WordPress/openverse-infrastructure/pull/720

.github/workflows/ci_cd.yml

@@ -1025,22 +1025,6 @@ jobs:
           wait_time: 60 # check every minute
           max_time: 1800 # allow up to 30 minutes for a deployment
 
-      - name: Deploy staging thumbnails
-        uses: felixp8/[email protected]
-        with:
-          owner: WordPress
-          repo: openverse-infrastructure
-          token: ${{ secrets.ACCESS_TOKEN }}
-          event_type: deploy_staging_api_thumbnails
-          client_payload: |
-            {
-              "actor": "${{ github.actor }}",
-              "tag": "${{ needs.get-image-tag.outputs.image_tag }}",
-              "run_name": "${{ steps.commit.outputs.commit_message }}"
-            }
-          wait_time: 60 # check every minute
-          max_time: 1800 # allow up to 30 minutes for a deployment
-
   ################
   # Notification #
   ################