Remove docker caching from all tests

Persisting them takes about 2.5min

.github/workflows/ci.yaml

@@ -20,13 +20,6 @@ jobs:
       - name: set up docker buildx
         run: docker buildx create --name builder --use
 
-      - name: cache docker layers
-        uses: actions/cache@v2
-        with:
-          path: /tmp/.buildx-cache
-          key: docker-buildx-rs-${{ github.sha }}
-          restore-keys: docker-buildx-rs-
-
       - name: Rust Cache
         uses: Swatinem/rust-cache@v2
         with:
@@ -38,11 +31,6 @@ jobs:
         working-directory: test-framework
         run: cargo test -p e2e-tests
 
-      - name: prevent the cache from growing too large
-        run: |
-          rm -rf /tmp/.buildx-cache
-          mv /tmp/.buildx-cache-new /tmp/.buildx-cache
-
   compliance-tests-og:
     runs-on: ubuntu-latest
     env:
@@ -82,13 +70,6 @@ jobs:
       - name: set up docker buildx
         run: docker buildx create --name builder --use
 
-      - name: cache docker layers
-        uses: actions/cache@v2
-        with:
-          path: /tmp/.buildx-cache
-          key: docker-buildx-rs-${{ github.sha }}
-          restore-keys: docker-buildx-rs-
-
       - name: Rust Cache
         uses: Swatinem/rust-cache@v2
         with:
@@ -111,11 +92,6 @@ jobs:
           cargo test -p sudo-compliance-tests -- --ignored | tee "$tmpfile"
           grep 'test result: FAILED. 0 passed' "$tmpfile" || ( echo "expected ALL tests to fail but at least one passed; the passing tests must be un-#[ignore]-d" && exit 1 )
 
-      - name: prevent the cache from growing too large
-        run: |
-          rm -rf /tmp/.buildx-cache
-          mv /tmp/.buildx-cache-new /tmp/.buildx-cache
-
   compliance-tests-lint:
     runs-on: ubuntu-latest