Remove redundant code

[kennymckormick]

No description provided.

[innerlee]

Since you are at it, I guess the merge_configs has been implemented in mmcv?

[codecov]

Codecov Report

Merging #310 into master will decrease coverage by 0.05%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #310      +/-   ##
==========================================
- Coverage   82.35%   82.29%   -0.06%     
==========================================
  Files          95       95              
  Lines        6777     6777              
  Branches     1099     1099              
==========================================
- Hits         5581     5577       -4     
- Misses        987      990       +3     
- Partials      209      210       +1     

Flag	Coverage Δ
unittests	82.29% <ø> (-0.06%)	⬇️

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Impacted Files	Coverage Δ
mmaction/datasets/pipelines/augmentations.py	94.45% <0.00%> (-0.55%)	⬇️

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[kennymckormick]

@tangh Hi, tang, seems the code is added by you in PR #198 . It is used in any circumstances during testing?

[kennymckormick]

Since you are at it, I guess the merge_configs has been implemented in mmcv?

Yes, we can replace it.

[tangh]

@tangh Hi, tang, seems the code is added by you in PR #198 . It is used in any circumstances during testing?

Hi, these codes are added to avoid an error when someone running test script but have never run the training script. #198 (comment)

[kennymckormick]

@tangh Hi, tang, seems the code is added by you in PR #198 . It is used in any circumstances during testing?

Hi, these codes are added to avoid an error when someone running test script but have never run the training script. #198 (comment)

Got it. I think it would be good to check if the output path exists (if not, mkdir), rather than mkdir work_dir