cleanup: remove unused methods

[JacksonTian]

No description provided.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (0e77c67) 83.19% compared to head (e57b314) 83.15%.

❗ Current head e57b314 differs from pull request most recent head d2769b9. Consider uploading reports for the commit d2769b9 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #875      +/-   ##
==========================================
- Coverage   83.19%   83.15%   -0.04%     
==========================================
  Files          47       47              
  Lines        3243     3236       -7     
==========================================
- Hits         2698     2691       -7     
  Misses        414      414              
  Partials      131      131              

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