fix: duplicate vesting account tx command

[ryanchristo]

Description

Closes: #1143

Fix duplication of tx vesting command and remove ineffectual line breaks.

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Author Checklist

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I have...

• included the correct type prefix in the PR title
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• provided a link to the relevant issue or specification
• followed the guidelines for building modules
• included the necessary unit and integration tests
• added a changelog entry to CHANGELOG.md
• included comments for documenting Go code
• updated the relevant documentation or specification
• reviewed "Files changed" and left comments if necessary
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Reviewers Checklist

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I have...

• confirmed the correct type prefix in the PR title
• confirmed ! in the type prefix if API or client breaking change
• confirmed all author checklist items have been addressed
• reviewed state machine logic
• reviewed API design and naming
• reviewed documentation is accurate
• reviewed tests and test coverage
• manually tested (if applicable)

[codecov]

Codecov Report

Merging #1149 (9a3d0e3) into master (faeb38a) will increase coverage by 0.07%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1149      +/-   ##
==========================================
+ Coverage   69.29%   69.37%   +0.07%     
==========================================
  Files         220      220              
  Lines       22801    22798       -3     
==========================================
+ Hits        15800    15816      +16     
+ Misses       5619     5593      -26     
- Partials     1382     1389       +7     

Flag	Coverage Δ
experimental-codecov	69.40% <ø> (+0.10%)	⬆️
stable-codecov	63.70% <ø> (+0.03%)	⬆️

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