fixed all the warnings

[jurgenvinju]

No description provided.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[jurgenvinju]

@PaulKlint I searched for code generating calls to the private $usage function in $RascalModule but could not find it, so I cleaned it up. Is that ok?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 45%. Comparing base (95b16df) to head (ec53da9).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##              main   #2875   +/-   ##
=======================================
  Coverage       45%     45%           
- Complexity    6803    6807    +4     
=======================================
  Files          843     843           
  Lines        68796   68778   -18     
  Branches     10030   10025    -5     
=======================================
  Hits         31373   31373           
+ Misses       35046   35024   -22     
- Partials      2377    2381    +4     

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