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-rw-r--r--compiler/rustc_mir_build/src/thir/cx/expr.rs1
1 files changed, 0 insertions, 1 deletions
diff --git a/compiler/rustc_mir_build/src/thir/cx/expr.rs b/compiler/rustc_mir_build/src/thir/cx/expr.rs
index 9086412c09a..cecb8a61aa2 100644
--- a/compiler/rustc_mir_build/src/thir/cx/expr.rs
+++ b/compiler/rustc_mir_build/src/thir/cx/expr.rs
@@ -780,7 +780,6 @@ impl<'tcx> Cx<'tcx> {
             hir::ExprKind::DropTemps(ref source) => {
                 ExprKind::Use { source: self.mirror_expr(source) }
             }
-            hir::ExprKind::Box(ref value) => ExprKind::Box { value: self.mirror_expr(value) },
             hir::ExprKind::Array(ref fields) => {
                 ExprKind::Array { fields: self.mirror_exprs(fields) }
             }