Fix warnings during tests

The deny(warnings) attribute is now enabled for tests so we need to weed out
these warnings as well.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libstd/sync/mpsc/select.rs b/src/libstd/sync/mpsc/select.rs
index d743cbb1890..5aa4ce81b8a 100644
--- a/src/libstd/sync/mpsc/select.rs
+++ b/src/libstd/sync/mpsc/select.rs
@@ -789,7 +789,7 @@ mod tests {
     fn fmt_debug_handle() {
         let (_, rx) = channel::<i32>();
         let sel = Select::new();
-        let mut handle = sel.handle(&rx);
+        let handle = sel.handle(&rx);
         assert_eq!(format!("{:?}", handle), "Handle { .. }");
     }
 }