refactor(toml): remove Scanner test

[timreichen]

These test cases are covered by other tests.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.54%. Comparing base (645875e) to head (2aefbfb).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6584   +/-   ##
=======================================
  Coverage   94.54%   94.54%           
=======================================
  Files         580      580           
  Lines       43772    43772           
  Branches     6480     6480           
=======================================
  Hits        41384    41384           
  Misses       2345     2345           
  Partials       43       43           

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[kt3k]

They look good for demonstrating what Scanner does as test cases. I'm not in favor of removing them

See also https://www.thecoder.cafe/p/unit-tests-as-documentation