ci: Remove community_delete_comments (#33396)

This was a temporary mitigation against a spam campaign, I don't think
this is required any longer. We can easily revert if it's still active.

See:
- https://github.com/zed-industries/zed/pull/16886

Release Notes:

- N/A

.github/workflows/community_delete_comments.yml

@@ -1,34 +0,0 @@
-name: Delete Mediafire Comments
-
-on:
-  issue_comment:
-    types: [created]
-
-permissions:
-  issues: write
-
-jobs:
-  delete_comment:
-    if: github.repository_owner == 'zed-industries'
-    runs-on: ubuntu-latest
-    steps:
-      - name: Check for specific strings in comment
-        id: check_comment
-        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7
-        with:
-          script: |
-            const comment = context.payload.comment.body;
-            const triggerStrings = ['www.mediafire.com'];
-            return triggerStrings.some(triggerString => comment.includes(triggerString));
-
-      - name: Delete comment if it contains any of the specific strings
-        if: steps.check_comment.outputs.result == 'true'
-        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7
-        with:
-          script: |
-            const commentId = context.payload.comment.id;
-            await github.rest.issues.deleteComment({
-              owner: context.repo.owner,
-              repo: context.repo.repo,
-              comment_id: commentId
-            });