fix: fixed remove_unused.py script

[bskqd]

I couldn't find the root cause of this issue locally, so I just wrapped it in the try/except block, and I also refactored the script a little bit

resolves #745

[codecov[bot]]

Codecov Report

Merging #746 (8735a70) into develop (aa1acb3) will decrease coverage by 0.02%. The diff coverage is 0.00%.

:exclamation: Current head 8735a70 differs from pull request most recent head 5964aeb. Consider uploading reports for the commit 5964aeb to get more accurate results

@@             Coverage Diff             @@
##           develop     #746      +/-   ##
===========================================
- Coverage    77.72%   77.71%   -0.02%     
===========================================
  Files          114      114              
  Lines        12307    12309       +2     
===========================================
  Hits          9566     9566              
- Misses        2741     2743       +2     

Impacted Files	Coverage Δ
utility/util.py	80.48% <0.00%> (-1.00%)	:arrow_down: