chore: remove full image build poc

.github/workflows/build-full-app.yml

@@ -1,41 +0,0 @@
-name: Build Full App Docker Image
-
-on:     
-  workflow_run:
-    workflows: ["Build Base App Docker Image"]
-    types:
-      - completed
-
-  workflow_dispatch:
-
-jobs:
-  publish:
-    runs-on: ubuntu-latest
-    permissions:
-      contents: read
-      packages: write
-
-    steps:
-    - uses: actions/checkout@v2
-
-    - name: Set up QEMU
-      uses: docker/setup-qemu-action@v2
-    
-    - name: Set up Docker Buildx
-      uses: docker/setup-buildx-action@v2
-
-    - name: Login to GitHub Container Registry
-      uses: docker/login-action@v2
-      with:
-        registry: ghcr.io
-        username: ${{ github.actor }}
-        password: ${{ secrets.GITHUB_TOKEN }}
-
-    - name: Docker Build & Push
-      uses: docker/build-push-action@v3
-      with:
-        context: .
-        file: docker/full.Dockerfile
-        platforms: linux/amd64,linux/arm64
-        push: true
-        tags: ghcr.io/ietf-tools/datatracker-app-full:latest