Remove old decode_data.py manage command

Found while documenting for C0111, this was old code for the initial "decode" functionality that was replaced by decode_data in utils.py

Signed-off-by: Corey Shields <cshields@gmail.com>

db/base/management/commands/decode_data.py

@@ -1,45 +0,0 @@
-from __future__ import absolute_import, division, print_function, \
-    unicode_literals
-
-from django.core.management.base import BaseCommand
-
-from db.base.models import DemodData, Satellite, Telemetry
-
-
-class Command(BaseCommand):
-    help = 'Decode Satellite data'
-
-    def add_arguments(self, parser):
-        # Positional arguments
-        parser.add_argument('satellite_identifiers', nargs='+', metavar='<Satellite Identifier>')
-
-    def handle(self, *args, **options):
-        for item in options['satellite_identifiers']:
-            satellites = Satellite.objects.all()
-            for satellite in satellites:
-                if satellite.has_telemetry_decoders:
-                    data = DemodData.objects.filter(satellite=satellite).filter(payload_decoded='')
-                    telemetry_decoders = Telemetry.objects.filter(satellite=satellite)
-
-                    for obj in data:
-                        for option in telemetry_decoders:
-                            decoder_module = 'db.base.decoders.{0}'.format(option.decoder)
-                            decoder = __import__(decoder_module, fromlist='.')
-
-                            with open(obj.payload_frame.path) as data_file:
-                                frame = data_file.read()
-
-                            try:
-                                payload_decoded = decoder.decode_payload(
-                                    frame, obj.timestamp, obj.data_id
-                                )
-                            except ValueError:
-                                obj.payload_decoded = ''
-                                obj.payload_telemetry = None
-                                obj.save()
-                                continue
-                            else:
-                                obj.payload_decoded = payload_decoded
-                                obj.payload_telemetry = option
-                                obj.save()
-                                break