Remove util.TypeOf helper function

[yuxincs]

This PR simply removes the helper function util.TypeOf. Although it shortens the call from pass.TypesInfo.TypeOf, it increases the cognitive load such that we do not know which we should use in NilAway's codebase and we don't know if util.TypeOf has any special handling (it doesn't!). Moreover, we're using a mixture of these two functionally-identical expressions in our codebase.

Removal of such a helper function reduces confusions and helps maintainability.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.44%. Comparing base (3062237) to head (310e4b5).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #242      +/-   ##
==========================================
- Coverage   87.44%   87.44%   -0.01%     
==========================================
  Files          61       61              
  Lines        7808     7804       -4     
==========================================
- Hits         6828     6824       -4     
  Misses        801      801              
  Partials      179      179              

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[github-actions]

Golden Test

Note

✅ NilAway errors reported on standard libraries are identical.

3296 errors on base branch (main, 3062237)
3296 errors on test branch (1b6d0c4)

[sonalmahajan15]

LGTM!