clean working migrations

djangoldp_polls/migrations/0002_auto_20200423_1035.py

djangoldp_polls/migrations/0003_auto_20200423_1045.py

djangoldp_polls/migrations/0004_auto_20200423_1055.py

djangoldp_polls/migrations/0005_auto_20200423_1131.py

djangoldp_polls/migrations/0006_auto_20200423_1152.py

djangoldp_polls/migrations/0007_auto_20200423_1157.py

djangoldp_polls/migrations/0008_auto_20200423_1206.py

djangoldp_polls/migrations/0009_auto_20200423_1208.py

djangoldp_polls/migrations/0010_auto_20200423_1210.py

djangoldp_polls/migrations/0011_auto_20200423_1213.py

djangoldp_polls/migrations/0012_auto_20200423_1214.py

djangoldp_polls/migrations/0013_auto_20200423_1216.py

djangoldp_polls/migrations/0014_auto_20200423_1217.py

djangoldp_polls/migrations/0015_auto_20200423_1219.py

djangoldp_polls/migrations/0016_auto_20200423_1220.py

djangoldp_polls/migrations/0017_auto_20200423_1221.py

djangoldp_polls/migrations/0018_auto_20200423_1224.py

djangoldp_polls/migrations/0019_auto_20200423_1928.py

djangoldp_polls/migrations/0020_auto_20200423_1929.py

djangoldp_polls/migrations/0021_auto_20200423_1934.py