ci: remove main branch protection rules (#5125)

.github/workflows/branch-rules.yml

@@ -1,36 +0,0 @@
-name: Branch Rules
-
-on:
-  pull_request:
-    branches:
-      - main
-      - canary
-      - 'v*-staging'
-
-jobs:
-  check-branch:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-        with:
-          fetch-depth: 0
-
-      - name: Filter changed files
-        uses: dorny/paths-filter@de90cc6fb38fc0963ad72b210f1f284cd68cea36 # v3.0.2
-        id: filter
-        with:
-          base: ${{ github.base_ref }}
-          filters: |
-            # 'src' filter matches any file NOT in the docs/ directory
-            src:
-              - '!docs/**'
-            # 'docs' filter matches any file in the docs/ directory
-            docs:
-              - 'docs/**'
-
-      - name: Enforce code change PRs target canary or staging
-        if: steps.filter.outputs.src == 'true' && github.base_ref != 'canary' && !startsWith(github.base_ref, 'v')
-        run: |
-          echo "Error: Pull requests with code changes must target 'canary' or a versioned staging branch (e.g., 'v1.2.3-staging')."
-          exit 1

.github/workflows/main-protect.yml

@@ -1,18 +0,0 @@
-name: Main Branch Protection
-
-on:
-  pull_request:
-    branches:
-      - main
-
-jobs:
-  check-branch:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Check branch
-        run: |
-          if [[ ${GITHUB_HEAD_REF} != canary ]] && ! [[ ${GITHUB_HEAD_REF} =~ ^v[0-9]+\.[0-9]+\.[0-9]+-staging$ ]];
-          then
-            echo "Error: Pull request must come from 'canary' or 'v*.*.*-staging' branch"
-            exit 1
-          fi