Elements. Remove V1 TypeParameterElement.

Change-Id: Ia04eac5e5a92de635630bd002b73c29919411863
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/423213
Reviewed-by: Brian Wilkerson <[email protected]>
Commit-Queue: Konstantin Shcheglov <[email protected]>

Author: scheglov

pkg/analyzer/api.txt

@@ -3224,7 +3224,6 @@ package:analyzer/dart/element/element.dart:
     name (getter: String)
     parameterKind (getter: ParameterKind, deprecated)
     parameters (getter: List<ParameterElement>)
-    typeParameters (getter: List<TypeParameterElement>, deprecated)
     appendToWithoutDelimiters (method: void Function(StringBuffer, {bool withNullability}))
   PartElement (class extends Object implements _ExistingElement, deprecated):
     new (constructor: PartElement Function())
@@ -3246,13 +3245,6 @@ package:analyzer/dart/element/element.dart:
     shownNames (getter: List<String>)
   TypeDefiningElement (class extends Object implements Element, deprecated):
     new (constructor: TypeDefiningElement Function())
-  TypeParameterElement (class extends Object implements TypeDefiningElement, deprecated):
-    new (constructor: TypeParameterElement Function())
-    bound (getter: DartType?)
-    declaration (getter: TypeParameterElement)
-    displayName (getter: String)
-    name (getter: String)
-    instantiate (method: TypeParameterType Function({required NullabilitySuffix nullabilitySuffix}))
   UndefinedElement (class extends Object implements Element, deprecated):
     new (constructor: UndefinedElement Function())
   UriReferencedElement (class extends Object implements _ExistingElement, deprecated):

pkg/analyzer/lib/dart/element/element.dart

@@ -1108,13 +1108,6 @@ abstract class ParameterElement
   /// parameter.
   List<ParameterElement> get parameters;
 
-  /// The type parameters defined by this parameter.
-  ///
-  /// A parameter will only define type parameters if it is a function typed
-  /// parameter.
-  @Deprecated(elementModelDeprecationMsg)
-  List<TypeParameterElement> get typeParameters;
-
   /// Appends the type, name and possibly the default value of this parameter
   /// to the given [buffer].
   void appendToWithoutDelimiters(
@@ -1193,33 +1186,6 @@ abstract class ShowElementCombinator implements NamespaceCombinator {
 @Deprecated('Use TypeDefiningElement2 instead')
 abstract class TypeDefiningElement implements Element {}
 
-/// A type parameter.
-///
-/// Clients may not extend, implement or mix-in this class.
-@Deprecated('Use TypeParameterElement2 instead')
-abstract class TypeParameterElement implements TypeDefiningElement {
-  /// The type representing the bound associated with this parameter, or `null`
-  /// if this parameter does not have an explicit bound. Being able to
-  /// distinguish between an implicit and explicit bound is needed by the
-  /// instantiate to bounds algorithm.
-  DartType? get bound;
-
-  @override
-  TypeParameterElement get declaration;
-
-  @override
-  String get displayName;
-
-  @override
-  String get name;
-
-  /// Creates the [TypeParameterType] with the given [nullabilitySuffix] for
-  /// this type parameter.
-  TypeParameterType instantiate({
-    required NullabilitySuffix nullabilitySuffix,
-  });
-}
-
 /// A pseudo-elements that represents names that are undefined. This situation
 /// is not allowed by the language, so objects implementing this interface
 /// always represent an error. As a result, most of the normal operations on

pkg/analyzer/lib/src/dart/element/element.dart

@@ -8875,7 +8875,10 @@ mixin ParameterElementMixin
   @override
   TypeImpl get type;
 
-  @override
+  /// The type parameters defined by this parameter.
+  ///
+  /// A parameter will only define type parameters if it is a function typed
+  /// parameter.
   List<TypeParameterElementImpl> get typeParameters;
 
   @override
@@ -10603,10 +10606,7 @@ abstract class TypeDefiningElementImpl2 extends ElementImpl2
     implements TypeDefiningElement2 {}
 
 class TypeParameterElementImpl extends ElementImpl
-    implements
-        // ignore:deprecated_member_use_from_same_package,analyzer_use_new_elements
-        TypeParameterElement,
-        TypeParameterFragment {
+    implements TypeParameterFragment {
   @override
   String? name2;
 
@@ -10639,7 +10639,10 @@ class TypeParameterElementImpl extends ElementImpl
     isSynthetic = true;
   }
 
-  @override
+  /// The type representing the bound associated with this parameter, or `null`
+  /// if this parameter does not have an explicit bound. Being able to
+  /// distinguish between an implicit and explicit bound is needed by the
+  /// instantiate to bounds algorithm.
   TypeImpl? get bound {
     return _bound;
   }
@@ -10774,7 +10777,8 @@ class TypeParameterElementImpl extends ElementImpl
     return shared.Variance.unrelated;
   }
 
-  @override
+  /// Creates the [TypeParameterType] with the given [nullabilitySuffix] for
+  /// this type parameter.
   TypeParameterTypeImpl instantiate({
     required NullabilitySuffix nullabilitySuffix,
   }) {