Suppress unused warnings and clean up workspace

codegen/tests/test_oneofs.rs

@@ -1,13 +1,5 @@
-use roto_codegen::generator::generate_rust_code;
-use roto_codegen::google::protobuf::descriptor::{
-    DescriptorProto, FieldDescriptorProto, FileDescriptorSet,
-};
-use std::collections::HashMap;
-
 #[test]
 fn test_oneof_generation() {
-    let mut set = FileDescriptorSet::new(b"").unwrap(); // Simplified for testing
-
     // In a real scenario, we'd build up a FileDescriptorSet from a proto.
     // For this unit test, we'll manually construct a DescriptorProto that has a oneof.