🗑️ chore: remove workflow-validation job

Remove redundant workflow-validation job:

- Local validation script is sufficient

- Simplifies CI workflow

- Reduces CI execution time

- Removes potential failure point

Workflow validation now handled locally

before pushing to repository.

.gitea/workflows/go-ci-cd.yaml

@@ -102,29 +102,6 @@ jobs:
           fi
           echo "✅ Code is properly formatted"
 
-  workflow-validation:
-    name: Arcodange Workflow Validation
-    runs-on: ubuntu-latest
-    if: github.event_name == 'pull_request' || contains(github.ref, 'ci/')
-
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v4
-
-      - name: Run Arcodange workflow validation
-        run: ./scripts/cicd/validate-workflow.sh
-
-      - name: Check for workflow changes in PR
-        if: github.event_name == 'pull_request'
-        run: |
-          echo "🔍 Checking workflow changes..."
-          changes=$(git diff origin/main -- .gitea/workflows/ | grep -q "^-")
-          if [ $changes ]; then
-            echo "⚠️  Workflow changes detected - review recommended"
-          else
-            echo "✅ No workflow changes"
-          fi
-
   version-check:
     name: Version Management
     runs-on: ubuntu-latest