fix errors and warnings in DDC

pkg/dev_compiler/lib/src/compiler/ast_builder.dart

Index: pkg/dev_compiler/lib/src/compiler/ast_builder.dart
diff --git a/pkg/dev_compiler/lib/src/compiler/ast_builder.dart b/pkg/dev_compiler/lib/src/compiler/ast_builder.dart
index 352efdbaa52afb1ec15650767f9fb858a240ae48..b6e6364fdedb5d7ae2ca00c9eeae35003eaad0f8 100644
--- a/pkg/dev_compiler/lib/src/compiler/ast_builder.dart
+++ b/pkg/dev_compiler/lib/src/compiler/ast_builder.dart
@@ -322,16 +322,6 @@ class AstBuilder {
     return application(parenthesize(l), <Expression>[e1]);
   }
 
-  static SimpleFormalParameter simpleFormal(SimpleIdentifier v, TypeName t) {
-    return RawAstBuilder.simpleFormalParameter(v, t);
-  }
-
-  static FunctionTypedFormalParameter functionTypedFormal(
-      TypeName ret, SimpleIdentifier v, List<FormalParameter> params) {
-    FormalParameterList ps = formalParameterList(params);
-    return RawAstBuilder.functionTypedFormalParameter(ret, v, ps);
-  }
-
   static FormalParameter requiredFormal(NormalFormalParameter fp) {
     return RawAstBuilder.requiredFormalParameter(fp);
   }
@@ -560,17 +550,6 @@ class RawAstBuilder {
     return astFactory.returnStatement(ret, e, semi);
   }
 
-  static SimpleFormalParameter simpleFormalParameter(
-      SimpleIdentifier v, TypeName t) {
-    return astFactory.simpleFormalParameter(null, <Annotation>[], null, t, v);
-  }
-
-  static FunctionTypedFormalParameter functionTypedFormalParameter(
-      TypeName ret, SimpleIdentifier v, FormalParameterList ps) {
-    return astFactory.functionTypedFormalParameter(
-        null, <Annotation>[], ret, v, null, ps);
-  }
-
   static FormalParameter requiredFormalParameter(NormalFormalParameter fp) {
     return fp;
   }