CI: Remove release email

The [email protected] mailing list is going away.
GitHub releases are already being generated (though the release notes
generation doesn't seem to be working 100% correctly) but this needs to
happen or we start getting failures soon.

Issue: RELENG-4931
Change-Id: I0a2e61cf67b1fd6fef38718d83a1531bc65825ef
Signed-off-by: Andrew Grimberg <[email protected]>

.github/workflows/release.yaml

@@ -18,27 +18,6 @@ jobs:
         run: >-
           VER=$(echo "${{ steps.tag.outputs.tag }}" | tr . -)
           echo "ANCHOR=${VER}" >> $GITHUB_ENV
-      - name: Notify mailing list
-        uses: dawidd6/action-send-mail@v3
-        with:
-          server_address: ${{ vars.MAIL_SERVER }}
-          server_port: ${{ vars.MAIL_SERVER_PORT }}
-          secure: true
-          username: ${{ secrets.MAIL_USER }}
-          password: ${{ secrets.MAIL_PASSWORD }}
-          subject: common-packer ${{ steps.tag.outputs.tag }} released
-          to: [email protected]
-          from: ${{ vars.MAIL_FROM }}
-          body: |
-            Hi Everyone,
-
-            common-packer ${{ steps.tag.outputs.tag }} is released. Thanks to everyone who contributed
-            to this release. Release notes are avaiable online at:
-
-            https://docs.releng.linuxfoundation.org/projects/common-packer/en/stable/release-notes.html#${{ env.ANCHOR }}
-
-            Cheers,
-            LF Releng
       - name: Configure Python
         uses: actions/setup-python@v4
         with: