[O2B-1100] Delete subsystems

[martinboulais]

I have a JIRA ticket

• branch and/or PR name(s) include(s) JIRA ID
• issue has "Fix version" assigned
• issue "Status" is set to "In review"
• PR labels are selected

Notable changes for users:

• (Unused) Subsystems have been removed

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 43.76%. Comparing base (982d3a2) to head (3c6ed8d).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1433      +/-   ##
==========================================
- Coverage   43.92%   43.76%   -0.17%     
==========================================
  Files         873      856      -17     
  Lines       14993    14728     -265     
  Branches     2853     2805      -48     
==========================================
- Hits         6586     6446     -140     
+ Misses       8407     8282     -125     

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[graduta]

I believe there are still a few remaining places such as toTreeView.test.js that are still referring to subsystem. Could you please have a look?