Remove frontend code for security_auto_fix with functionalities

What does this MR do and why?

Remove frontend code for security_auto_fix with functionalities.

Related issue: [Feature flag] Cleanup security_auto_fix (#435432 - closed) • Zamir Martins • 17.0 • Needs attention

Follow-up from: Remove auto fix worker with migration (!147051 - merged) • Zamir Martins • 16.11

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.gitlab/ci/package-and-test-nightly/main.gitlab-ci.yml

@@ -9,11 +9,11 @@ workflow:
 
 .ce:
   variables:
-    RELEASE: ${REGISTRY_HOST}/${REGISTRY_GROUP}/build/omnibus-gitlab-mirror/gitlab-ce:${CI_COMMIT_SHA}
+    RELEASE: "${REGISTRY_HOST}/${REGISTRY_GROUP}/build/omnibus-gitlab-mirror/gitlab-ce:${RELEASE_IMAGE_TAG}"
 
 .ee:
   variables:
-    RELEASE: ${REGISTRY_HOST}/${REGISTRY_GROUP}/build/omnibus-gitlab-mirror/gitlab-ee:${CI_COMMIT_SHA}
+    RELEASE: "${REGISTRY_HOST}/${REGISTRY_GROUP}/build/omnibus-gitlab-mirror/gitlab-ee:${RELEASE_IMAGE_TAG}"
 
 # ==========================================
 # Prepare stage