Remove unused subset of the flagset interface.

[aalexand]

No description provided.

[codecov-io]

Codecov Report

Merging #508 into master will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master    #508      +/-   ##
=========================================
+ Coverage   67.09%   67.1%   +0.01%     
=========================================
  Files          37      37              
  Lines        7603    7603              
=========================================
+ Hits         5101    5102       +1     
+ Misses       2097    2096       -1     
  Partials      405     405

Impacted Files	Coverage Δ
internal/driver/driver_focus.go	86.06% <ø> (+0.81%)	⬆️

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[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.10%. Comparing base (2827a3c) to head (67c62e9).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #508      +/-   ##
==========================================
+ Coverage   67.06%   67.10%   +0.04%     
==========================================
  Files          37       37              
  Lines        7611     7603       -8     
==========================================
- Hits         5104     5102       -2     
+ Misses       2103     2096       -7     
- Partials      404      405       +1     

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