revert changes to gitea workflows

.gitea/workflows/build.yaml

@@ -1,7 +1,7 @@
 on: [push]
 name: CI
 jobs:
-  build_and_test:
+  build:
     name: Rust project
     runs-on: ubuntu-latest
     steps:
@@ -13,3 +13,15 @@ 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"