Revert "First step toward resolving generic function types" (TBR)

pkg/analyzer/lib/src/generated/resolver.dart

Index: pkg/analyzer/lib/src/generated/resolver.dart
diff --git a/pkg/analyzer/lib/src/generated/resolver.dart b/pkg/analyzer/lib/src/generated/resolver.dart
index 24a8cd360a791dca15770275dd4e691eba426357..6287f80eda76cd463a4b9d1f5ebe9d307fe27100 100644
--- a/pkg/analyzer/lib/src/generated/resolver.dart
+++ b/pkg/analyzer/lib/src/generated/resolver.dart
@@ -9850,23 +9850,6 @@ class TypeResolverVisitor extends ScopedVisitor {
   }
 
   @override
-  Object visitGenericFunctionType(GenericFunctionType node) {
-    DartType returnType = node.returnType?.type ?? DynamicTypeImpl.instance;
-    List<TypeParameterElement> typeParameters = node
-        .typeParameters.typeParameters
-        .map((TypeParameter parameter) =>
-            parameter.element as TypeParameterElement)
-        .toList();
-    List<ParameterElement> parameters = node.parameters.parameters
-        .map((FormalParameter parameter) => parameter.element)
-        .toList();
-    (node as GenericFunctionTypeImpl).type =
-        new FunctionTypeImpl.forGenericFunctionType(
-            typeParameters, DartType.EMPTY_LIST, returnType, parameters, false);
-    return null;
-  }
-
-  @override
   Object visitMethodDeclaration(MethodDeclaration node) {
     super.visitMethodDeclaration(node);
     ExecutableElementImpl element = node.element as ExecutableElementImpl;