Jonathan/remove unused import pub

[jgimeno]

Description

closes: #XXXX

---

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

• Targeted PR against correct branch (see CONTRIBUTING.md)
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• Code follows the module structure standards.
• Wrote unit and integration tests
• Updated relevant documentation (docs/) or specification (x/<module>/spec/)
• Added relevant godoc comments.
• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md
• Re-reviewed Files changed in the Github PR explorer
• Review Codecov Report in the comment section below once CI passes

[codecov]

Codecov Report

Merging #8704 (d4c796d) into sahith/fix-key-multi (2539acd) will decrease coverage by 0.09%.
The diff coverage is 49.74%.

@@                   Coverage Diff                    @@
##           sahith/fix-key-multi    #8704      +/-   ##
========================================================
- Coverage                 61.46%   61.37%   -0.10%     
========================================================
  Files                       659      670      +11     
  Lines                     37932    38267     +335     
========================================================
+ Hits                      23316    23487     +171     
- Misses                    12172    12327     +155     
- Partials                   2444     2453       +9     

Impacted Files	Coverage Δ
crypto/keyring/keyring.go	59.17% <0.00%> (-0.83%)	⬇️
types/module/module.go	82.71% <ø> (ø)
x/bank/legacy/v040/keys.go	0.00% <ø> (ø)
x/gov/legacy/v040/keys.go	0.00% <0.00%> (ø)
x/slashing/legacy/v040/keys.go	0.00% <0.00%> (ø)
x/staking/legacy/v040/keys.go	0.00% <0.00%> (ø)
client/keys/migrate.go	46.37% <42.85%> (+2.89%)	⬆️
x/bank/keeper/migrations.go	50.00% <50.00%> (+50.00%)	⬆️
x/distribution/keeper/migrations.go	50.00% <50.00%> (ø)
x/gov/keeper/migrations.go	50.00% <50.00%> (ø)
... and 31 more

[sahith-narahari]

lgtm, should I merge this @jgimeno