or-patterns: euv/`arm_move_mode`: remove `top_pats_hack`.

diff --git a/src/librustc/middle/expr_use_visitor.rs b/src/librustc/middle/expr_use_visitor.rs
index ef84c9bbad60dab0214fc20840e4b34b20f0ede4..0e97a3b59d082baf2174cbb874fff4de9d83f9b4 100644 (file)
--- a/src/librustc/middle/expr_use_visitor.rs
+++ b/src/librustc/middle/expr_use_visitor.rs
@@ -779,9 +779,7 @@ fn walk_autoref(&mut self,
 
     fn arm_move_mode(&mut self, discr_cmt: mc::cmt<'tcx>, arm: &hir::Arm) -> TrackMatchMode {
         let mut mode = Unknown;
-        for pat in arm.top_pats_hack() {
-            self.determine_pat_move_mode(discr_cmt.clone(), &pat, &mut mode);
-        }
+        self.determine_pat_move_mode(discr_cmt.clone(), &arm.pat, &mut mode);
         mode
     }