removed custom nonce managing logic

[dabasov]

Changes

Fixes

Tests

Tasks to complete before merging PR:

• [ ] Ensure system tests are passing. If not Run them manually to check for any regressions :clipboard:
• [ ] Do any new system tests need added to test this change? do any existing system tests need updated? If so create a PR at 0chain/system_test
• [ ] Merge your system tests PR to master AFTER merging this PR

Associated PRs (Link as appropriate):

• 0chain:
• gosdk:
• system_test:
• zboxcli:
• zwalletcli:
• Other: ...

[codecov-commenter]

Codecov Report

Merging #1136 (6e9079a) into staging (bb3ceed) will not change coverage. The diff coverage is n/a.

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@@           Coverage Diff            @@
##           staging    #1136   +/-   ##
========================================
  Coverage    26.57%   26.57%           
========================================
  Files           80       80           
  Lines         9075     9075           
========================================
  Hits          2412     2412           
  Misses        6354     6354           
  Partials       309      309           

Flag	Coverage Δ
Unit-Tests	26.57% <ø> (ø)

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