Cleanup: Clean the checkor module

[haozturk]

Impact of the new feature
Project management

Is your feature request related to a problem? Please describe.
There many things to delete and to improve in this module. It needs a serious clean-up. It's very hard to maintain right now.

Describe the solution you'd like
Remove all the redundant code pieces in the first step.

Describe alternatives you've considered
None

Additional context
@z4027163 @jenimal FYI