remove submodule mention

.gitea/workflows/dev.yaml

@@ -17,8 +17,6 @@ jobs:
     steps:
       - name: clone
         uses: actions/checkout@v3
-        with:
-          submodules: true
 
       - name: setup hugo
         uses: https://github.com/peaceiris/actions-hugo@v2

.gitea/workflows/prod.yaml

@@ -19,8 +19,6 @@ jobs:
     steps:
       - name: clone
         uses: actions/checkout@v3
-        with:
-          submodules: true
 
       - name: setup hugo
         uses: https://github.com/peaceiris/actions-hugo@v2
@@ -51,8 +49,6 @@ jobs:
     steps:
       - name: clone
         uses: actions/checkout@v3
-        with:
-          submodules: true
 
       - name: setup hugo
         uses: https://github.com/peaceiris/actions-hugo@v2
@@ -75,8 +71,6 @@ jobs:
     steps:
       - name: clone
         uses: actions/checkout@v3
-        with:
-          submodules: true
 
       - name: setup hugo
         uses: https://github.com/peaceiris/actions-hugo@v2

.gitmodules

@@ -1,3 +0,0 @@
-[submodule "static/plugins/mdi"]
-	path = static/plugins/mdi
-	url = https://git.cantorgymnasium.de/gcg/MaterialDesign-Webfont.git