Remove simulator / tests specific code from firmware

[tadeubas]

What is this PR for?

Remove code specific for simulator / tests from firmware. Adapted simulator / tests to work.

Changes made to:

• [x] Code
• [x] Tests
• [ ] Docs
• [ ] CHANGELOG

Did you build the code and tested on device?

• [x] Yes, Yahboom

What is the purpose of this pull request?

• [ ] Bug fix
• [ ] New feature
• [ ] Docs update
• [x] Other

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 95.37%. Comparing base (8dbd794) to head (1f1d2bb). Report is 1 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #588      +/-   ##
===========================================
+ Coverage    95.35%   95.37%   +0.01%     
===========================================
  Files           76       76              
  Lines         8619     8607      -12     
===========================================
- Hits          8219     8209      -10     
+ Misses         400      398       -2     

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[odudex]

Thank you!