Remove mark-issue-duplicate workflow temporarily (#19178)

.github/workflows/mark-issue-duplicate.yml

@@ -1,21 +0,0 @@
-name: Mark Issue Duplicate
-
-on:
-  issue_comment:
-    types:
-      - created
-
-permissions:
-  issues: write
-
-jobs:
-  mark-duplicate:
-    runs-on: ubuntu-latest
-    if: ${{ !github.event.issue.pull_request && startsWith(github.event.comment.body, 'Duplicate of ') }}
-    steps:
-      - uses: actions-cool/issues-helper@1c9e803c80cc7fed000022d4c94f4b5bc2e90062 # v3.8.0
-        with:
-          actions: "mark-duplicate"
-          token: ${{ secrets.GITHUB_TOKEN }}
-          duplicate-labels: "type:duplicate"
-          close-issue: true