[Fix] Fix BC-breaking of timm for TSN

[cir7]

Motivation

[Fix] Fix BC-breaking of timm for TSN

[codecov]

Codecov Report

Patch coverage: 28.00% and project coverage change: +0.02 🎉

Comparison is base (b94df49) 76.96% compared to head (974cd7c) 76.99%.

❗ Current head 974cd7c differs from pull request most recent head 8bae4cd. Consider uploading reports for the commit 8bae4cd to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           dev-1.x    #2497      +/-   ##
===========================================
+ Coverage    76.96%   76.99%   +0.02%     
===========================================
  Files          159      159              
  Lines        12598    12617      +19     
  Branches      2116     2121       +5     
===========================================
+ Hits          9696     9714      +18     
- Misses        2393     2398       +5     
+ Partials       509      505       -4     

Flag	Coverage Δ
unittests	76.99% <28.00%> (+0.02%)	⬆️

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Impacted Files	Coverage Δ
mmaction/testing/__init__.py	100.00% <ø> (ø)
mmaction/models/recognizers/base.py	70.32% <14.28%> (+1.97%)	⬆️
mmaction/models/recognizers/recognizer2d.py	74.57% <45.45%> (+14.96%)	⬆️

... and 1 file with indirect coverage changes

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