feat: remove task manager channels

[Freyskeyd]

Description

Remove the code linked to the task manager where we explore the use of channels.

PR Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added or updated tests that comprehensively prove my change is effective or that my feature works

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (f0bc90c) 63.12% compared to head (a6b338b) 62.86%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #391      +/-   ##
==========================================
- Coverage   63.12%   62.86%   -0.26%     
==========================================
  Files         219      219              
  Lines       11793    11793              
==========================================
- Hits         7444     7414      -30     
- Misses       4349     4379      +30     

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