diff --git a/addons/thunderbird/installer.py b/addons/thunderbird/installer.py
index 69644f55579..5bf11218842 100644
--- a/addons/thunderbird/installer.py
+++ b/addons/thunderbird/installer.py
@@ -21,11 +21,9 @@
 
 from osv import fields
 from osv import osv
-from tools import config
 
 import base64
 import addons
-import difflib
 
 class thunderbird_installer(osv.osv_memory):
     _name = 'thunderbird.installer'