无JIRA editor的watermark可以set为空

src/base/single/editor/editor.js

@@ -239,10 +239,6 @@ BI.Editor = BI.inherit(BI.Single, {
         return this.options.errorText;
     },
 
-    setWatermark: function (v) {
-        this.setWaterMark(v);
-    },
-
     setWaterMark: function (v) {
 
         this.options.watermark = v;