remove unneeded ; from warnLeavingUnsaved of application.js (#13811)

Contributed by Adrian Wilkins.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11731 e93f8b46-1217-0410-a6f0-8f06a7374b81

public/javascripts/application.js

@@ -546,7 +546,7 @@ function warnLeavingUnsaved(message) {
     });
     if (warn) {return warnLeavingUnsavedMessage;}
   };
-};
+}
 
 function setupAjaxIndicator() {