Remove lib-check prereq for running release (#239)

## Issue
As part of [PR
237](#237),
the `lib-check` CI step was moved to run during pull request from
release. However, the release still `needs` `lib-check` which no longer
exists

## Solution
Remove the `lib-check` pre-req for release

Author: shayancanonical

.github/workflows/release.yaml

@@ -22,7 +22,6 @@ jobs:
   release:
     name: Release charm
     needs:
-      - lib-check
       - ci-tests
       - build
     uses: canonical/data-platform-workflows/.github/workflows/[email protected]