Remove stray debug line

This line was accidentally left laying around.

Signed-off-by: Sebastian Spaeth <Sebastian@SSpaeth.de>

offlineimap/imaputil.py

@@ -168,7 +168,6 @@ def imapsplit(imapstring):
             elif splitslen == 0:
                 # There was not even an unquoted word.
                 break
-    getglobalui().warn("%s->%s" % (imapstring, retval))
     return retval
 
 flagmap = [('\\Seen', 'S'),