Clean up more

Author: tiif

compiler/rustc_middle/src/ty/print/pretty.rs

@@ -3250,7 +3250,7 @@ define_print! {
             ty::ClauseKind::ConstEvaluatable(ct) => {
                 p!("the constant `", print(ct), "` can be evaluated")
             }
-            ty::ClauseKind::UnstableFeature(_) => p!("unstable impl"), // TODO: fix this later
+            ty::ClauseKind::UnstableFeature(_) => p!("unstable feature"), // TODO: fix this later
         }
     }
 

compiler/rustc_type_ir/src/interner.rs

@@ -103,7 +103,7 @@ pub trait Interner:
     type ParamTy: Copy + Debug + Hash + Eq + ParamLike;
     type BoundTy: Copy + Debug + Hash + Eq + BoundVarLike<Self>;
     type PlaceholderTy: PlaceholderLike;
-    type Symbol: Copy + Hash + PartialEq + Eq + TypeFoldable<Self> + TypeVisitable<Self>; // TODO: add more trait if we need it, keep it minimal for now.
+    type Symbol: Copy + Hash + PartialEq + Eq + TypeFoldable<Self> + TypeVisitable<Self>;
 
     // Things stored inside of tys
     type ErrorGuaranteed: Copy + Debug + Hash + Eq;