removing snyk workflow (#4850)

.github/workflows/snyk.yml

@@ -1,17 +0,0 @@
-name: Snyk Monitor Scanning
-on:
- release:
-   types: [published]
- push:
-    branches:
-      - 'main'
-      - 'master'
- workflow_dispatch:
-
-jobs:
-  snyk-scan-ci:
-    # only run in grafana/tempo.
-    if: github.repository == 'grafana/tempo'    
-    uses: 'grafana/security-github-actions/.github/workflows/snyk_monitor.yml@main'
-    secrets:
-      SNYK_TOKEN: ${{ secrets.SNYK_TOKEN }}