Remove suffix from API docs headers

[jodal]

This creates more noise than it is helpful. The introduction on each page spells out what the module name means.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (2e90c95) to head (48dd6b3).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #390   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           15        15           
  Lines         1077      1077           
  Branches       111       111           
=========================================
  Hits          1077      1077           

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