Remove PHPMD workflow

.github/workflows/phpmd.yml

@@ -1,41 +0,0 @@
-name: PHPMD
-
-on:
-  push:
-    branches: [ "main" ]
-  pull_request:
-    branches: [ "main" ]
-  schedule:
-    - cron: '00 03 * * 1'
-
-permissions:
-  contents: read
-
-jobs:
-  PHPMD:
-    name: Run PHPMD Scanning
-    runs-on: ubuntu-latest
-    permissions:
-      contents: read
-      security-events: write
-      actions: read
-
-    steps:
-      - name: Checkout Source Code
-        uses: actions/checkout@v4
-
-      - name: Setup Environment
-        uses: shivammathur/setup-php@v2
-        with:
-          coverage: none
-          tools: phpmd
-
-      - name: Run PHPMD
-        run: phpmd . sarif codesize --reportfile phpmd-results.sarif
-        continue-on-error: true
-
-      - name: Upload Analysis Results
-        uses: github/codeql-action/upload-sarif@v2
-        with:
-          sarif_file: phpmd-results.sarif
-          wait-for-processing: true