Remove numpy data type

[lihuoran]

Description

Linked issue(s)/Pull request(s)

• issue_number

Type of Change

• Non-breaking bug fix
• Breaking bug fix
• New feature
• Test
• Doc update
• Docker update

Related Component

• Simulation toolkit
• RL toolkit
• Distributed toolkit

Has Been Tested

• OS:
  • Windows
  • Mac OS
  • Linux
• Python version:
  • 3.7
  • 3.8
  • 3.9
• Key information snapshot(s):

Needs Follow Up Actions

• New release package
• New docker image

Checklist

• Add/update the related comments
• Add/update the related tests
• Add/update the related documentations
• Update the dependent downstream modules usage

[codecov]

Codecov Report

Merging #571 (9dd7252) into v0.3 (a4e3168) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             v0.3     #571   +/-   ##
=======================================
  Coverage   79.30%   79.30%           
=======================================
  Files          86       86           
  Lines        5464     5464           
=======================================
  Hits         4333     4333           
  Misses       1131     1131           

Flag	Coverage Δ
unittests	79.30% <ø> (ø)

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