remove submodule checkout from CI pipelines

Submodule contains only dev context (Claude agents, design system),
not needed for building the Docker image.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitea/workflows/docker-build.yml

@@ -11,8 +11,6 @@ jobs:
     steps:
       - name: "[code] repository checkout"
         uses: actions/checkout@v3
-        with:
-          submodules: recursive
       - name: "[ledo] Image build"
         run: ledo image build
       - name: "[ledo] Image push"

.gitea/workflows/docker-tag.yml

@@ -11,12 +11,6 @@ jobs:
     steps:
       - name: "[code] repository checkout"
         uses: actions/checkout@v3
-        with:
-          submodules: recursive
-      - name: checkout submodule
-        run: |
-          git submodule init
-          git submodule update
       - name: "[ledo] Image build"
         run: |
           ledo image build