Delete unnecessary about_dialog function from Main

diff --git a/src/main.py b/src/main.py
index 69c3104..1736c7e 100755 (executable)
--- a/src/main.py
+++ b/src/main.py
@@ -147,10 +147,6 @@ class Gtk_Presentation(object):
         window.show_all()
         gtk.main()
 
-    def about_dialog(self, btn):
-        from about import About
-        About()
-
     #=== Search selecting =====================================================
     def show_search_toplevel(self, btn, searchtype):
         print 'Entering <' + searchtype + '> search mode...'