correct gitea workflows

.gitea/workflows/build.yaml

@@ -13,15 +13,3 @@ jobs:
         with:
           command: build
           args: --release
-  build_custom_pieces:
-    name: Rust project
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-      - uses: actions-rs/toolchain@v1
-        with:
-          toolchain: stable
-      - uses: actions-rs/cargo@v1
-        with:
-          command: build
-          args: --release --features "custom_pieces"