Fixed error "Duplicate data property in object literal not allowed in strict mode" found when linting the code.

lib/ace/ext/textarea.js

@@ -193,7 +193,6 @@ exports.transformTextarea = function(element, loader) {
     var settingOpener = document.createElement("div");
     applyStyles(settingOpener, {
         position: "absolute",
-        width: "15px",
         right: "0px",
         bottom: "0px",
         background: "red",