chore: remove sync label

.github/workflows/sync-labels.yaml

@@ -1,28 +0,0 @@
-# yaml-language-server: $schema=https://json.schemastore.org/github-workflow.json
-
-name: Sync labels
-
-on:
-  workflow_call:
-    secrets:
-      GITHUB_TOKEN:
-        description: 'GitHub token'
-        required: true
-
-permissions:
-  contents: read
-  issues: write
-
-jobs:
-  main:
-    name: Sync labels
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: ⤵️ Check out code from GitHub
-        uses: actions/checkout@v4
-
-      - name: 🚀 Run Label Syncer
-        uses: micnncim/action-label-syncer@v1
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}