[py]: remove redundant actions array of action_chains

[symonk]

remove the redundant _actions attribute of ActionChains, this is unused and just reassigned to an empty list.

[codecov-commenter]

Codecov Report

Merging #10716 (2ecbfe3) into trunk (f677d2d) will decrease coverage by 0.00%.
The diff coverage is n/a.

❗ Current head 2ecbfe3 differs from pull request most recent head 053b24c. Consider uploading reports for the commit 053b24c to get more accurate results

@@            Coverage Diff             @@
##            trunk   #10716      +/-   ##
==========================================
- Coverage   46.64%   46.64%   -0.01%     
==========================================
  Files          86       86              
  Lines        5855     5853       -2     
  Branches      278      277       -1     
==========================================
- Hits         2731     2730       -1     
  Misses       2846     2846              
+ Partials      278      277       -1     

Impacted Files	Coverage Δ
py/selenium/webdriver/common/action_chains.py	32.00% <ø> (-0.29%)	⬇️

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