remove 'convert' command

cms/djangoapps/capaconverter/management/commands/convert.py

-###
-### One-off script for importing courseware form XML format
-###
-
-from django.core.management.base import BaseCommand, CommandError
-import json
-from capaconverter import CapaXMLConverter
-
-
-class Command(BaseCommand):
-    help = \
-'''Import the specified data directory into the default ModuleStore'''
-
-    def handle(self, *args, **options):
-        self.converter = CapaXMLConverter()
-        # print json.dumps(self.converter.convert_xml_file("/Users/ccp/code/mitx_all/mitx/1.xml"), indent=2)
-        print json.dumps(self.converter.convert_xml_file("/Users/ccp/code/mitx_all/data/6.002x/problems/HW3ID1.xml"), indent=2)
-        # print json.dumps(self.converter.convert_xml_file("/Users/ccp/code/mitx_all/data/6.002x/problems/multichoice.xml"), indent=2)