Remove future imports

internewshid/chn_spreadsheet/migrations/0001_initial.py

...hid/chn_spreadsheet/migrations/0002_add_geopoll_config.py

.../chn_spreadsheet/migrations/0003_update_geopoll_config.py

...id/chn_spreadsheet/migrations/0004_add_rapidpro_config.py

.../chn_spreadsheet/migrations/0005_update_geopoll_config.py

...chn_spreadsheet/migrations/0006_update_rapidpro_config.py

...chn_spreadsheet/migrations/0007_update_rapidpro_config.py

.../chn_spreadsheet/migrations/0008_update_geopoll_config.py

...chn_spreadsheet/migrations/0009_update_rapidpro_config.py

...chn_spreadsheet/migrations/0010_update_rapidpro_config.py

.../chn_spreadsheet/migrations/0011_update_geopoll_config.py

...hid/chn_spreadsheet/migrations/0012_auto_20181008_1321.py

...hid/chn_spreadsheet/migrations/0013_auto_20181019_1607.py

...hid/chn_spreadsheet/migrations/0014_auto_20191216_1054.py

internewshid/dashboard/migrations/0001_initial.py

internewshid/dashboard/migrations/0002_auto_20150709_1244.py

...ewshid/dashboard/migrations/0003_widgetinstance_height.py

internewshid/data_layer/migrations/0001_initial.py

...rnewshid/data_layer/migrations/0002_auto_20150619_2132.py

internewshid/data_layer/migrations/0003_message_terms.py