Problem: benchmark logic don't increase nonce

[yihuang]

Solution:

• keep the benchmark logic closer to real one, only removing the nonce check part

Closes: #XXX

Description

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For contributor use:

• 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

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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

Attention: Patch coverage is 75.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 61.55%. Comparing base (f3e62cb) to head (73996bb).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #502   +/-   ##
========================================
  Coverage    61.55%   61.55%           
========================================
  Files          128      128           
  Lines         9499     9499           
========================================
  Hits          5847     5847           
  Misses        3112     3112           
  Partials       540      540           

Files	Coverage Δ
app/ante/eth.go	78.86% <100.00%> (+0.17%)	⬆️
app/ante/handler_options.go	61.11% <0.00%> (-0.43%)	⬇️