[dart mode] Remove support for inline keyword

mode/dart/dart.js

@@ -15,7 +15,7 @@
     "implements mixin get native set typedef with enum throw rethrow assert break case " +
     "continue default in return new deferred async await covariant try catch finally " +
     "do else for if switch while import library export part of show hide is as extension " +
-    "on yield late required sealed base interface when inline").split(" ");
+    "on yield late required sealed base interface when").split(" ");
   var blockKeywords = "try catch finally do else for if switch while".split(" ");
   var atoms = "true false null".split(" ");
   var builtins = "void bool num int double dynamic var String Null Never".split(" ");