Revert "[misc] Add automatic duplicate issue detection"

This reverts commit 15b2d3db1d.

.github/workflows/potential-duplicates.yml

@@ -1,20 +0,0 @@
-name: Potential Duplicates
-on:
-  issues:
-    types: [opened, edited]
-
-jobs:
-  run:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: wow-actions/potential-duplicates@v1
-        with:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          label: potential-duplicate
-          state: all
-          threshold: 0.3
-          comment: |
-            This issue is potentially a duplicate of one of the following issues:
-            {{#issues}}
-              - #{{ number }} ({{ accuracy }}%)
-            {{/issues}}