Remove commented code.

[raklaptudirm]

Many files have code which is commented out (Especially main functions as tests). Remove them and write proper tests.

[github-actions]

This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 5 days.

[github-actions]

This issue was closed because it has been stalled for 7 days with no activity.