[Refactor] remove onnx related tools

[cir7]

Motivation

remove onnx related tools

[codecov[bot]]

Codecov Report

Base: 74.70% // Head: 74.70% // No change to project coverage :thumbsup:

Coverage data is based on head (b7908a4) compared to base (a15b934). Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff            @@
##           dev-1.x    #1928   +/-   ##
========================================
  Coverage    74.70%   74.70%           
========================================
  Files          133      133           
  Lines         9260     9260           
  Branches      1584     1584           
========================================
  Hits          6918     6918           
  Misses        2023     2023           
  Partials       319      319           

Flag	Coverage Δ
unittests	74.70% <ø> (ø)

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