Revert "Add support for generic function type syntax, part 1" (TBR)

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

Index: pkg/dev_compiler/lib/src/compiler/code_generator.dart
diff --git a/pkg/dev_compiler/lib/src/compiler/code_generator.dart b/pkg/dev_compiler/lib/src/compiler/code_generator.dart
index afabcf3a6cb464103b5cce1d8cd97a446732f367..60469c3b0640f1d3e74fe166c68b07362b77a1ca 100644
--- a/pkg/dev_compiler/lib/src/compiler/code_generator.dart
+++ b/pkg/dev_compiler/lib/src/compiler/code_generator.dart
@@ -3624,15 +3624,7 @@ class CodeGenerator extends GeneralizingAstVisitor
     } else if (typeArgs != null) {
       // Dynamic calls may have type arguments, even though the function types
       // are not known.
-      return typeArgs.arguments.map((argument) {
-        if (argument is TypeName) {
-          return visitTypeName(argument);
-        } else {
-          // TODO(brianwilkerson) Implement support for GenericFunctionType.
-          throw new StateError(
-              'Cannot compile type argument of kind ${argument.runtimeType}');
-        }
-      }).toList(growable: false);
+      return typeArgs.arguments.map(visitTypeName).toList(growable: false);
     }
     return null;
   }