Shorten the ViewHistory class a little bit

[Snuffleupagus]

• Replace the manual loop, used to find an existing entry, with the native findIndex method.

• Remove the fingerprint/cacheSize class fields, since they are completely unused.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.01%. Comparing base (7fc7072) to head (664526e).

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #21678      +/-   ##
==========================================
+ Coverage   90.00%   90.01%   +0.01%     
==========================================
  Files         263      263              
  Lines       66854    66849       -5     
==========================================
+ Hits        60173    60176       +3     
+ Misses       6681     6673       -8     

Flag	Coverage Δ
browsertest	66.54% <ø> (+<0.01%)	⬆️
integrationtest	69.36% <100.00%> (+<0.01%)	⬆️
unittest	57.83% <ø> (-0.01%)	⬇️
unittestcli	56.55% <ø> (-0.01%)	⬇️

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[timvandermeij]

Thank you for simplifying this a bit!