Combine identical alias arms

compiler/rustc_ty_utils/src/layout.rs

@@ -444,7 +444,7 @@ fn layout_of_uncached<'tcx>(
         }
 
         // Types with no meaningful known layout.
-        ty::Alias(ty::Projection, _) | ty::Alias(ty::Opaque, ..) => {
+        ty::Alias(..) => {
             // NOTE(eddyb) `layout_of` query should've normalized these away,
             // if that was possible, so there's no reason to try again here.
             return Err(LayoutError::Unknown(ty));

compiler/rustc_ty_utils/src/needs_drop.rs

@@ -152,10 +152,7 @@ where
                             queue_type(self, required);
                         }
                     }
-                    ty::Array(..)
-                    | ty::Alias(ty::Opaque, ..)
-                    | ty::Alias(ty::Projection, ..)
-                    | ty::Param(_) => {
+                    ty::Array(..) | ty::Alias(..) | ty::Param(_) => {
                         if ty == component {
                             // Return the type to the caller: they may be able
                             // to normalize further than we can.