update docker build script

.gitea/workflows/build-docker.yml

@@ -17,15 +17,6 @@ jobs:
         id: get_version
         run: echo "current_version=$(cat version.txt)" >> $GITHUB_ENV
 
-      - name: Increment version
-        id: increment_version
-        run: |
-          current_version=${{ env.current_version }}
-          IFS='.' read -r -a version_parts <<< "$current_version"
-          version_parts[2]=$((version_parts[2] + 1))
-          new_version="${version_parts[0]}.${version_parts[1]}.${version_parts[2]}"
-          echo "new_version=$new_version" >> $GITHUB_ENV
-
       - name: Log in to Gitea Docker Registry
         run: echo "${{ secrets.DOCKER_PASSWORD }}" | docker login https://gitea.suda.codes -u ${{ secrets.DOCKER_USERNAME }} --password-stdin