Adjust trait imports

Author: nikomatsakis

src/librustc_typeck/check/coercion.rs

@@ -68,8 +68,7 @@ use middle::traits::{predicate_for_trait_def, report_selection_error};
 use middle::ty::adjustment::{AutoAdjustment, AutoDerefRef, AdjustDerefRef};
 use middle::ty::adjustment::{AutoPtr, AutoUnsafe, AdjustReifyFnPointer};
 use middle::ty::adjustment::{AdjustUnsafeFnPointer};
-use middle::ty::{self, LvaluePreference, TypeAndMut, Ty};
-use middle::ty::fold::TypeFoldable;
+use middle::ty::{self, HasTypeFlags, LvaluePreference, TypeAndMut, Ty};
 use middle::ty::error::TypeError;
 use middle::ty::relate::RelateResult;
 use util::common::indent;