Revert "Add NormalFormalParameter.covariantKeyword setter and factory parameter."

pkg/analyzer/lib/src/generated/testing/ast_test_factory.dart

Index: pkg/analyzer/lib/src/generated/testing/ast_test_factory.dart
diff --git a/pkg/analyzer/lib/src/generated/testing/ast_test_factory.dart b/pkg/analyzer/lib/src/generated/testing/ast_test_factory.dart
index 009646dd0d805e2f79b67f893e5b7c5c73f1df14..2139d380c56b45b9e2ac161459cc6aa5a3f8aeba 100644
--- a/pkg/analyzer/lib/src/generated/testing/ast_test_factory.dart
+++ b/pkg/analyzer/lib/src/generated/testing/ast_test_factory.dart
@@ -488,7 +488,6 @@ class AstTestFactory {
       astFactory.fieldFormalParameter(
           null,
           null,
-          null,
           keyword == null ? null : TokenFactory.tokenFromKeyword(keyword),
           type,
           TokenFactory.tokenFromKeyword(Keyword.THIS),
@@ -611,7 +610,7 @@ class AstTestFactory {
   static FunctionTypedFormalParameter functionTypedFormalParameter(
           TypeAnnotation returnType, String identifier,
           [List<FormalParameter> parameters]) =>
-      astFactory.functionTypedFormalParameter(null, null, null, returnType,
+      astFactory.functionTypedFormalParameter(null, null, returnType,
           identifier3(identifier), null, formalParameterList(parameters));
 
   static HideCombinator hideCombinator(List<SimpleIdentifier> identifiers) =>
@@ -1070,7 +1069,6 @@ class AstTestFactory {
       astFactory.simpleFormalParameter(
           null,
           null,
-          null,
           keyword == null ? null : TokenFactory.tokenFromKeyword(keyword),
           type,
           identifier3(parameterName));