tests: remove deprecated scan.yml workflow

.github/workflows/scan.yml

@@ -1,36 +0,0 @@
-name: static code analysis
-
-on:
-  push:
-  schedule:
-    - cron: '0 0 * * 1'
-
-env:
-  SCAN_IMG:
-    yubico-yes-docker-local.jfrog.io/static-code-analysis/c:v1
-  COMPILE_DEPS: "libykclient-dev libykpers-1-dev libyubikey-dev libmysqlclient-dev"
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@master
-
-    - name: Prep scan
-      run: |
-        docker login yubico-yes-docker-local.jfrog.io/ \
-             -u svc-static-code-analysis-reader \
-             -p ${{ secrets.ARTIFACTORY_READER_TOKEN }}
-        docker pull ${SCAN_IMG}
-
-    - name: Scan and fail if warnings
-      run: |
-        docker run -v${PWD}:/k -e COMPILE_DEPS="${COMPILE_DEPS}" \
-          -e PROJECT_NAME=${GITHUB_REPOSITORY#Yubico/} -t ${SCAN_IMG}
-
-    - uses: actions/upload-artifact@master
-      if: failure()
-      with:
-        name: suppression_files
-        path: suppression_files