(maint) Remove trivy caches

The rate limiting issue Trivy had in
aquasecurity/trivy-action#389 has been resolved in the 0.29.0 release of the trivy-action.

This commit removes the cache since it is no longer needed.

Author: abottchen

.github/workflows/build-test-push.yml

@@ -29,9 +29,6 @@ jobs:
           vuln-type: os
           timeout: 10m0s
           skip-files: "/root/.pdk/cache/ruby/*/gems/aws-sdk-core-*/lib/aws-sdk-ssooidc/client.rb"
-        env:
-          TRIVY_SKIP_DB_UPDATE: true
-          TRIVY_SKIP_JAVA_DB_UPDATE: true
       - name: Run tests
         run: cd tests; ./run_tests.sh
       - name: Tag Docker images

.github/workflows/build-test.yml

@@ -28,9 +28,6 @@ jobs:
           vuln-type: os
           timeout: 10m0s
           skip-files: "/root/.pdk/cache/ruby/*/gems/aws-sdk-core-*/lib/aws-sdk-ssooidc/client.rb"
-        env:
-          TRIVY_SKIP_DB_UPDATE: true
-          TRIVY_SKIP_JAVA_DB_UPDATE: true
       - name: Run tests
         working-directory: ${{ github.workspace }}/tests
         run: ./run_tests.sh

.github/workflows/publish-4x-image.yml

@@ -33,9 +33,6 @@ jobs:
           vuln-type: os
           timeout: 10m0s
           skip-files: "/root/.pdk/cache/ruby/*/gems/aws-sdk-core-*/lib/aws-sdk-ssooidc/client.rb"
-        env:
-          TRIVY_SKIP_DB_UPDATE: true
-          TRIVY_SKIP_JAVA_DB_UPDATE: true
       - name: Publish standard image to 4.x
         env:
           IMAGE_TAG: ${{ github.event.inputs.image_tag }}