Added some exceptions for EMMO unit dimension classes

[jesper-friis]

Description

These classes are just providing the structure of the taxonomy and doesn't need to have a physical dimension.

Type of change

• Bug fix.
• New feature.
• Documentation update.
• Test update.

Checklist

This checklist can be used as a help for the reviewer.

• Is the code easy to read and understand?
• Are comments for humans to read, not computers to disregard?
• Does a new feature has an accompanying new test (in the CI or unit testing schemes)?
• Has the documentation been updated as necessary?
• Does this close the issue?
• Is the change limited to the issue?
• Are errors handled for all outcomes?
• Does the new feature provide new restrictions on dependencies, and if so is this documented?

Comments

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.87%. Comparing base (de542a3) to head (91794d5).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #819      +/-   ##
==========================================
- Coverage   72.90%   72.87%   -0.03%     
==========================================
  Files          18       18              
  Lines        3790     3790              
==========================================
- Hits         2763     2762       -1     
- Misses       1027     1028       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[jesper-friis]

Closing. Merged into update-emmocheck2