chore(ci): remove trivy cache cleaning

The updated trivy-action does not support cleaning the cache.

.github/workflows/scan.yml

@@ -12,33 +12,8 @@ env:
   CONTAINER_IMAGE_VERSION: ${{ github.sha }}
 
 jobs:
-  reset-trivy-cache:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Remove all caches and database of the trivy scanner
-        uses: aquasecurity/trivy-action@6e7b7d1fd3e4fef0c5fa8cce1229c54b2c9bd0d8
-        env:
-          TRIVY_RESET: true
-          TRIVY_DEBUG: true
-        with:
-          scan-type: "image"
-      - name: Download trivy vulnerabilities DB
-        uses: aquasecurity/trivy-action@6e7b7d1fd3e4fef0c5fa8cce1229c54b2c9bd0d8
-        env:
-          TRIVY_DEBUG: true
-          TRIVY_DOWNLOAD_DB_ONLY: true
-        with:
-          scan-type: "image"
-      - name: Download trivy Java index DB
-        uses: aquasecurity/trivy-action@6e7b7d1fd3e4fef0c5fa8cce1229c54b2c9bd0d8
-        env:
-          TRIVY_DEBUG: true
-          TRIVY_DOWNLOAD_JAVA_DB_ONLY: true
-        with:
-          scan-type: "image"
   vulnerability-scan:
     runs-on: ubuntu-latest
-    needs: reset-trivy-cache
     permissions:
       contents: read
       id-token: write # for cosign w/ keyless signing
@@ -53,7 +28,7 @@ jobs:
         env:
           TRIVY_USERNAME: ${{ github.actor }}
           TRIVY_PASSWORD: ${{ secrets.GITHUB_TOKEN }}
-          TRIVY_DEBUG: true
+          TRIVY_OFFLINE_SCAN: true
         with:
           image-ref: ${{ env.CONTAINER_REGISTRY }}/${{ env.CONTAINER_IMAGE_NAME }}:${{ env.CONTAINER_IMAGE_VERSION }}
           format: "sarif"
@@ -79,7 +54,7 @@ jobs:
         env:
           TRIVY_USERNAME: ${{ github.actor }}
           TRIVY_PASSWORD: ${{ secrets.GITHUB_TOKEN }}
-          TRIVY_DEBUG: true
+          TRIVY_OFFLINE_SCAN: true
         with:
           image-ref: ${{ env.CONTAINER_REGISTRY }}/${{ env.CONTAINER_IMAGE_NAME }}:${{ env.CONTAINER_IMAGE_VERSION }}
           format: "cosign-vuln"