Remove dependency on kr/pretty

[gdbelvin]

No description provided.

[codecov]

Codecov Report

Merging #1467 into master will increase coverage by 0.22%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1467      +/-   ##
==========================================
+ Coverage   67.83%   68.05%   +0.22%     
==========================================
  Files          54       54              
  Lines        4026     4026              
==========================================
+ Hits         2731     2740       +9     
+ Misses        893      888       -5     
+ Partials      402      398       -4

Impacted Files	Coverage Δ
core/integration/client_tests.go	85.24% <0%> (+0.46%)	⬆️
core/sequencer/server.go	73.61% <0%> (+0.65%)	⬆️
impl/sql/directory/storage.go	69.17% <0%> (+1.5%)	⬆️
core/keyserver/revisions.go	64.62% <0%> (+2.04%)	⬆️

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