chore(ci): 移除 pr-size-labeler workflow

.github/workflows/pr-size-labeler.yml

@@ -1,31 +0,0 @@
-name: PR Size Labeler
-
-on:
-  pull_request:
-    types: [opened, synchronize, reopened]
-
-permissions:
-  contents: read
-  pull-requests: write
-
-jobs:
-  size-label:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Label PR by size
-        uses: codelytv/pr-size-labeler@v1
-        with:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          xs_label: 'size/XS'
-          xs_max_size: '10'
-          s_label: 'size/S'
-          s_max_size: '100'
-          m_label: 'size/M'
-          m_max_size: '500'
-          l_label: 'size/L'
-          l_max_size: '1000'
-          xl_label: 'size/XL'
-          message_if_xl: |
-            这个 PR 改动较大（超过 1000 行），建议拆分成多个小 PR 以便 Review。
-
-            This PR is quite large (over 1000 lines). Consider splitting it into smaller PRs for easier review.