Remove min_type_alias_impl_trait feature

Author: spastorino

compiler/rustc_feature/src/active.rs

@@ -629,9 +629,6 @@ declare_features! (
     /// Allows macro attributes to observe output of `#[derive]`.
     (active, macro_attributes_in_derive_output, "1.51.0", Some(81119), None),
 
-    /// Allows the use of type alias impl trait in function return positions
-    (active, min_type_alias_impl_trait, "1.52.0", Some(63063), None),
-
     /// Allows associated types in inherent impls.
     (incomplete, inherent_associated_types, "1.52.0", Some(8995), None),
 

compiler/rustc_feature/src/removed.rs

@@ -152,6 +152,10 @@ declare_features! (
     (removed, impl_trait_in_bindings, "1.55.0", Some(63065), None,
      Some("the implementation was not maintainable, the feature may get reintroduced once the current refactorings are done")),
 
+    /// Allows the use of type alias impl trait in function return positions
+    (removed, min_type_alias_impl_trait, "1.55.0", Some(63063), None,
+     Some("removed in favor of full type_alias_impl_trait")),
+
     // -------------------------------------------------------------------------
     // feature-group-end: removed features
     // -------------------------------------------------------------------------