remove unused import commands (which were used for temporary profiling). Also change get_lms_link_for_item() to preserve the previous argument ordering. Apparently all callers may not use argument name conventions for the 'preview' argument.

cms/djangoapps/contentstore/utils.py

@@ -75,7 +75,7 @@ def get_course_for_item(location):
     return courses[0]
 
 
-def get_lms_link_for_item(location, course_id=None, preview=False):
+def get_lms_link_for_item(location, preview=False, course_id=None):
     if course_id is None:
         course_id = get_course_id(location)
 

common/lib/xmodule/xmodule/modulestore/mongo.py

@@ -2,8 +2,6 @@ import pymongo
 import sys
 import logging
 import copy
-import time
-import traceback
 
 from bson.son import SON
 from fs.osfs import OSFS