Chore: Remove CircleCI (#35014)

.circleci/config.yml

@@ -1,60 +0,0 @@
-version: 2.1
-
-aliases:
-  # Workflow filters
-  - &filter-only-main
-    branches:
-      only: main
-
-jobs:
-  scan-docker-image:
-    description: "Scans a docker image for vulnerabilities using trivy"
-    parameters:
-      image:
-        type: string
-      tag:
-        type: string
-    docker:
-      - image: circleci/buildpack-deps:stretch
-    steps:
-      - setup_remote_docker
-      - restore_cache:
-          key: vulnerability-db
-      - run:
-          name: Install trivy
-          command: |
-            VERSION=$(
-                curl --silent "https://api.github.com/repos/aquasecurity/trivy/releases/latest" | \
-                grep '"tag_name":' | \
-                sed -E 's/.*"v([^"]+)".*/\1/'
-            )
-
-            wget https://github.com/aquasecurity/trivy/releases/download/v${VERSION}/trivy_${VERSION}_Linux-64bit.tar.gz
-            tar zxvf trivy_${VERSION}_Linux-64bit.tar.gz
-            sudo mv trivy /usr/local/bin
-      - run:
-          name: Clear trivy cache
-          command: trivy --clear-cache
-      - run:
-          name: Scan Docker image for unkown/low/medium vulnerabilities
-          command: trivy --exit-code 0 --severity UNKNOWN,LOW,MEDIUM << parameters.image >>:<< parameters.tag >>
-      - run:
-          name: Scan Docker image for high/critical vulnerabilities
-          command: trivy --exit-code 1 --severity HIGH,CRITICAL << parameters.image >>:<< parameters.tag >>
-      - save_cache:
-          key: vulnerability-db
-          paths:
-            - $HOME/.cache/trivy
-
-workflows:
-  nightly:
-    triggers:
-      - schedule:
-          cron: "0 0 * * *"
-          filters: *filter-only-main
-    jobs:
-      - scan-docker-image:
-          matrix:
-            parameters:
-              image: [grafana/grafana, grafana/grafana-enterprise]
-              tag: [latest, main, latest-ubuntu, main-ubuntu]