fix: remove mention to mfg_inspector.MIMETYPE_MAP (google#870)

resolve google#854

Author: Minipada

openhtf/output/servers/station_server.py

@@ -32,9 +32,6 @@
 
 STATION_SERVER_TYPE = 'station'
 
-MIMETYPE_REVERSE_MAP = {
- v: k for k, v in six.iteritems(mfg_inspector.MIMETYPE_MAP)
-}
 MULTICAST_QUERY = 'OPENHTF_DISCOVERY'
 TEST_STATUS_COMPLETED = 'COMPLETED'