Fix lint error

Summary: I keep seeing this lint error. Is this intentional?

Reviewed By: stroxler

Differential Revision: D85474675

fbshipit-source-id: 6a0245cb088cf9124dd5beb401293e6a769afffd

Author: migeed-z

crates/pyrefly_build/src/query/mod.rs

@@ -23,6 +23,7 @@ use starlark_map::small_map::SmallMap;
 use starlark_map::small_set::SmallSet;
 use tempfile::NamedTempFile;
 use vec1::Vec1;
+#[allow(unused_imports)]
 use vec1::vec1;
 
 use crate::source_db::Target;