Merge pull request #72 from RussTedrake/collections_import

Remove unused import from collections.

Author: rdeits

src/meshcat/servers/zmqserver.py

@@ -7,7 +7,6 @@
 import sys
 import subprocess
 import multiprocessing
-from collections import deque
 
 if sys.version_info >= (3, 0):
     ADDRESS_IN_USE_ERROR = OSError