[Bugfix]skip compute when no tokens need to process

[Waynezee]

No description provided.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 14 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (develop@3f8cbd7). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
src/paddlefleet/transformer/moe/moe_layer.py	0.00%	14 Missing ⚠️

❌ Your patch status has failed because the patch coverage (0.00%) is below the target coverage (90.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff            @@
##             develop    #720   +/-   ##
=========================================
  Coverage           ?   0.00%           
=========================================
  Files              ?       1           
  Lines              ?      14           
  Branches           ?       1           
=========================================
  Hits               ?       0           
  Misses             ?      14           
  Partials           ?       0           

Flag	Coverage Δ
coverage_combine	0.00% <0.00%> (?)

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Files with missing lines	Coverage Δ
src/paddlefleet/transformer/moe/moe_layer.py	0.00% <0.00%> (ø)

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