Remove unused dependencies 'django-bower' and 'six' from 'requirements/dev.txt' & 'setup.py'

[vtalos]

As part of our ongoing research on Python dependency management, we identified a potential improvement in your project’s approach.

Specifically, the dependencies django-bower and six are listed in requirements/dev.txt and setup.py repsectively, but don’t appear to be used anywhere in the codebase.

In the case of six, it seems to have been added as a workaround to support transifex-client, rather than being required by the application code itself. However, transifex-client was removed from the project in March 2022 (commit f90991e).

Timeline Analysis:

• March 2019: 28720ce - Added six==1.11.0 to make transifex work
• March 2022: f90991e - Removed deprecated transifex-client

Cleaning them up can make your project easier to maintain and a bit safer in the long run.

Hope this is helpful!