revert thread safety issue

[willmcgugan]

Type of changes

• Bug fix
• New feature
• Documentation / docstrings
• Tests
• Other

Checklist

• I've run the latest black with default args on new code.
• I've updated CHANGELOG.md and CONTRIBUTORS.md where appropriate.
• I've added tests for new code.
• I accept that @willmcgugan may be pedantic in the code review.

Description

Please describe your changes here. If this fixes a bug, please link to the issue, if possible.

[codecov]

Codecov Report

Merging #1729 (03f40a9) into master (32eb546) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1729      +/-   ##
==========================================
- Coverage   99.82%   99.82%   -0.01%     
==========================================
  Files          71       71              
  Lines        6918     6915       -3     
==========================================
- Hits         6906     6903       -3     
  Misses         12       12              

Flag	Coverage Δ
unittests	99.82% <100.00%> (-0.01%)	⬇️

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Impacted Files	Coverage Δ
rich/console.py	100.00% <100.00%> (ø)
rich/live.py	100.00% <100.00%> (ø)
rich/live_render.py	100.00% <100.00%> (ø)

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