Elements. Remove V1 GenericFunctionTypeElement.

Change-Id: I2d144ed740f38c13355dcead83978ea5da6b073a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/423401
Commit-Queue: Konstantin Shcheglov <[email protected]>
Reviewed-by: Brian Wilkerson <[email protected]>

Author: scheglov

pkg/analyzer/api.txt

@@ -3178,8 +3178,6 @@ package:analyzer/dart/element/element.dart:
     parameters (getter: List<ParameterElement>)
     returnType (getter: DartType)
     type (getter: FunctionType)
-  GenericFunctionTypeElement (class extends Object implements FunctionTypedElement, deprecated):
-    new (constructor: GenericFunctionTypeElement Function())
   HideElementCombinator (class extends Object implements NamespaceCombinator):
     new (constructor: HideElementCombinator Function())
     hiddenNames (getter: List<String>)

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

@@ -929,12 +929,6 @@ abstract class FunctionTypedElement implements TypeParameterizedElement {
   FunctionType get type;
 }
 
-/// The pseudo-declaration that defines a generic function type.
-///
-/// Clients may not extend, implement, or mix-in this class.
-@Deprecated('Use GenericFunctionTypeElement2 instead')
-abstract class GenericFunctionTypeElement implements FunctionTypedElement {}
-
 /// A combinator that causes some of the names in a namespace to be hidden when
 /// being imported.
 ///

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

@@ -5037,13 +5037,8 @@ abstract class FunctionTypedElementImpl2 extends TypeParameterizedElementImpl2
 ///
 /// Clients may not extend, implement or mix-in this class.
 class GenericFunctionTypeElementImpl extends _ExistingElementImpl
-    with
-        TypeParameterizedElementMixin
-    implements
-        // ignore:deprecated_member_use_from_same_package,analyzer_use_new_elements
-        GenericFunctionTypeElement,
-        FunctionTypedElementImpl,
-        GenericFunctionTypeFragment {
+    with TypeParameterizedElementMixin
+    implements FunctionTypedElementImpl, GenericFunctionTypeFragment {
   /// The declared return type of the function.
   TypeImpl? _returnType;