Remove unused imports

src/inventory.py

@@ -1,12 +1,4 @@
-import collections
-from importlib import import_module
-from threading import current_thread, enumerate as threadingEnumerate, RLock
-import Queue
-import time
-import sys
-
 from bmconfigparser import BMConfigParser
-from helper_sql import *
 from singleton import Singleton
 
 # TODO make this dynamic, and watch out for frozen, like with messagetypes