Removed unused instance variable.

git-svn-id: http://svn.redmine.org/redmine/trunk@13524 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/attachment.rb

@@ -309,7 +309,7 @@ class Attachment < ActiveRecord::Base
     just_filename = value.gsub(/\A.*(\\|\/)/m, '')
 
     # Finally, replace invalid characters with underscore
-    @filename = just_filename.gsub(/[\/\?\%\*\:\|\"\'<>\n\r]+/, '_')
+    just_filename.gsub(/[\/\?\%\*\:\|\"\'<>\n\r]+/, '_')
   end
 
   # Returns the subdirectory in which the attachment will be saved