remove unneeded imports

src/c3nav/mapdata/management/commands/dumpmap.py

@@ -1,5 +1,3 @@
-import sys
-
 from django.core.management.base import BaseCommand, CommandError
 
 from ...packageio import write_packages

src/c3nav/mapdata/management/commands/loadmap.py

@@ -1,5 +1,3 @@
-import sys
-
 from django.core.management.base import BaseCommand, CommandError
 from django.db import transaction
 

src/c3nav/mapdata/packageio/read.py

@@ -1,12 +1,11 @@
 import json
 import os
-import sys
 
 from django.conf import settings
 from django.core.management.base import CommandError
 
 from ..models import Level, Package, Source
-from .utils import ObjectCollection, json_encode
+from .utils import ObjectCollection
 
 
 def read_packages():

src/c3nav/mapdata/packageio/utils.py

@@ -1,5 +1,4 @@
 import json
-import sys
 
 from django.core.management.base import CommandError
 

src/c3nav/mapdata/packageio/write.py

@@ -1,7 +1,6 @@
 import difflib
 import json
 import os
-import sys
 from datetime import datetime
 
 from django.conf import settings