Removing Unidecode dependency to avoid GPL clashes

[nickdjones]

Description

Remove Unidecode dependency to avoid GPL clashes.

Related resources

• https://github.com/django-cms/django-filer/issues/1266

Checklist

• [x] I have opened this pull request against master
• [x] I have added or modified the tests when changing logic
• [x] I have followed the conventional commits guidelines to add meaningful information into the changelog
• [x] I have read the contribution guidelines and I have joined #workgroup-pr-review on Slack to find a “pr review buddy” who is going to review my pull request.

[codecov[bot]]

Codecov Report

Merging #1346 (0519997) into master (7a4482f) will decrease coverage by 0.01%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1346      +/-   ##
==========================================
- Coverage   72.40%   72.39%   -0.01%     
==========================================
  Files          72       72              
  Lines        3269     3268       -1     
  Branches      532      532              
==========================================
- Hits         2367     2366       -1     
  Misses        735      735              
  Partials      167      167              

Impacted Files	Coverage Δ
filer/utils/files.py	69.51% <100.00%> (-0.37%)	:arrow_down:

[jrief]

Thanks