[pitivi] effects: Simplify _getEffectCategories

[Thibault Saunier <tsaunier src gnome org>]

commit 48db2a7602aa7038dfc3852f1738085140cd977a
Author: Alexandru Băluț <alexandru balut gmail com>
Date:   Tue Sep 30 00:44:10 2014 +0200

    effects: Simplify _getEffectCategories

 pitivi/effects.py |    4 ----
 1 files changed, 0 insertions(+), 4 deletions(-)
---
diff --git a/pitivi/effects.py b/pitivi/effects.py
index 36fb07c..15bd76f 100644
--- a/pitivi/effects.py
+++ b/pitivi/effects.py
@@ -243,18 +243,14 @@ class EffectsManager(object):
         for category in AUDIO_EFFECTS_CATEGORIES:
             if effect_name in category[1]:
                 categories.append(category[0])
-                self._audio_categories.add(category[0])
 
         for category in VIDEO_EFFECTS_CATEGORIES:
             if effect_name in category[1]:
                 categories.append(category[0])
-                self._video_categories.add(category[0])
 
         if not categories:
             uncategorized = _("Uncategorized")
             categories.append(uncategorized)
-            self._video_categories.add(uncategorized)
-            self._audio_categories.add(uncategorized)
 
         categories.insert(0, VIDEO_EFFECTS_CATEGORIES[0][0])
         categories.insert(0, AUDIO_EFFECTS_CATEGORIES[0][0])