Share the first error messages.

pkg/compiler/lib/src/diagnostics/messages.dart

Index: pkg/compiler/lib/src/diagnostics/messages.dart
diff --git a/pkg/compiler/lib/src/diagnostics/messages.dart b/pkg/compiler/lib/src/diagnostics/messages.dart
index f394bdf5cc93bfbfefbfb08d01ee470b8e7c023a..ba2d4d6119095829e8597e298139b2bfd46b334c 100644
--- a/pkg/compiler/lib/src/diagnostics/messages.dart
+++ b/pkg/compiler/lib/src/diagnostics/messages.dart
@@ -979,17 +979,6 @@ main() {}"""},
         const MessageTemplate(MessageKind.REDIRECTING_CONSTRUCTOR_HAS_BODY,
           "Redirecting constructor can't have a body."),
 
-      MessageKind.CONST_CONSTRUCTOR_HAS_BODY:
-        const MessageTemplate(MessageKind.CONST_CONSTRUCTOR_HAS_BODY,
-          "Const constructor or factory can't have a body.",
-          howToFix: "Remove the 'const' keyword or the body",
-          examples: const ["""
-class C {
-  const C() {}
-}
-
-main() => new C();"""]),
-
       MessageKind.REDIRECTING_CONSTRUCTOR_HAS_INITIALIZER:
         const MessageTemplate(
           MessageKind.REDIRECTING_CONSTRUCTOR_HAS_INITIALIZER,