remove duplicate imports due to submodule import

[graingert]

for example:

input:

import sys
import os
import sys
import os.path

expected output:

import os.path
import sys

reorder_python_imports also has this feature: https://github.com/asottile/reorder_python_imports#removes-duplicate-imports

[Aaradhyaa717]

Hi, I would like to work on this. It would be great if you could guide me on how do I approach this issue?