Polish for go vet

[alpe]

go vet run

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For admin use:

• Added appropriate labels to PR (ex. WIP, R4R, docs, etc)
• Reviewers assigned
• Squashed all commits, uses message "Merge pull request #XYZ: [title]" (coding standards)

[codecov]

Codecov Report

Merging #205 into master will not change coverage.
The diff coverage is 0.00%.

@@           Coverage Diff           @@
##           master     #205   +/-   ##
=======================================
  Coverage   71.71%   71.71%           
=======================================
  Files          27       27           
  Lines        2584     2584           
=======================================
  Hits         1853     1853           
  Misses        621      621           
  Partials      110      110           

Impacted Files	Coverage Δ
x/wasm/internal/keeper/query_plugins.go	57.71% <0.00%> (ø)

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[ethanfrey]

Lgtm