refactor: remove obsolete deploy workflow and comment out caching steps in Docker build workflow

.gitea/workflows/docker-build.yml

@@ -19,15 +19,15 @@ jobs:
     runs-on: ubuntu-latest
     
     steps:
-      - name: Cache Gitea Actions
-        uses: actions/cache@v3
-        with:
-          path: |
-            ~/.cache/actcache
-            ~/.cache/act
-          key: ${{ runner.os }}-act-${{ hashFiles('**/.gitea/workflows/*.yml') }}
-          restore-keys: |
-            ${{ runner.os }}-act-
+#      - name: Cache Gitea Actions
+#        uses: actions/cache@v3
+#        with:
+#          path: |
+#            ~/.cache/actcache
+#            ~/.cache/act
+#          key: ${{ runner.os }}-act-${{ hashFiles('**/.gitea/workflows/*.yml') }}
+#          restore-keys: |
+#            ${{ runner.os }}-act-
       
       - name: Checkout code
         uses: actions/checkout@v4