[Refactor] fix linter errors

[golopot]

Before:
✖ 91 problems (0 errors, 91 warnings)

After:
✖ 53 problems (0 errors, 53 warnings)

[codecov-commenter]

Codecov Report

Merging #3261 (9c76175) into master (5bc571d) will increase coverage by 0.02%.
The diff coverage is 92.85%.

❗ Current head 9c76175 differs from pull request most recent head 04da3f0. Consider uploading reports for the commit 04da3f0 to get more accurate results

@@            Coverage Diff             @@
##           master    #3261      +/-   ##
==========================================
+ Coverage   97.67%   97.70%   +0.02%     
==========================================
  Files         121      121              
  Lines        8575     8570       -5     
  Branches     3112     3112              
==========================================
- Hits         8376     8373       -3     
+ Misses        199      197       -2     

Impacted Files	Coverage Δ
lib/util/ast.js	97.57% <83.33%> (+1.12%)	⬆️
lib/rules/jsx-max-depth.js	98.55% <100.00%> (-0.03%)	⬇️
lib/rules/jsx-pascal-case.js	100.00% <100.00%> (ø)
lib/rules/jsx-sort-props.js	98.48% <100.00%> (ø)
lib/rules/require-render-return.js	100.00% <100.00%> (ø)
lib/rules/sort-comp.js	100.00% <100.00%> (ø)
lib/util/makeNoMethodSetStateRule.js	97.87% <100.00%> (ø)

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[ljharb]

Looks great, thanks