chore: remove workflows that are now applied org-wide (#22019)

.github/workflows/pr-require-conventional-commit.yml

@@ -1,19 +0,0 @@
-name: PR Conventional Commit Validation
-
-on:
-  pull_request:
-    types: [opened, synchronize, reopened, edited]
-
-permissions: {}
-
-jobs:
-  validate-pr-title:
-    runs-on: ubuntu-latest
-    permissions:
-      pull-requests: write
-    steps:
-      - name: PR Conventional Commit Validation
-        uses: ytanikin/PRConventionalCommits@b628c5a234cc32513014b7bfdd1e47b532124d98 # 1.3.0
-        with:
-          task_types: '["feat","fix","docs","test","ci","refactor","perf","chore","revert"]'
-          add_label: 'false'

.github/workflows/static_analysis.yml

@@ -106,30 +106,3 @@ jobs:
       # TODO: Use https://github.com/CQLabs/dcm-action
       - name: Run DCM
         run: dcm analyze lib --fatal-style --fatal-warnings
-
-  zizmor:
-    name: zizmor
-    runs-on: ubuntu-latest
-    permissions:
-      security-events: write
-      contents: read
-      actions: read
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
-        with:
-          persist-credentials: false
-
-      - name: Install the latest version of uv
-        uses: astral-sh/setup-uv@d4b2f3b6ecc6e67c4457f6d3e41ec42d3d0fcb86 # v5.4.2
-
-      - name: Run zizmor 🌈
-        run: uvx zizmor --format=sarif . > results.sarif
-        env:
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: Upload SARIF file
-        uses: github/codeql-action/upload-sarif@2d92b76c45b91eb80fc44c74ce3fce0ee94e8f9d # v3.30.0
-        with:
-          sarif_file: results.sarif
-          category: zizmor