commands/import/airspace: Use `.decode()` instead of `unicode` cast
commands/import/airspace: Use `.decode()` instead of `unicode` cast

Turbo87/skylines,Turbo87/skylines,skylines-project/skylines,Turbo87/skylines,Turbo87/skylines,skylines-project/skylines,skylines-project/skylines,skylines-project/skylines