Refactor doc

[AemikaChow]

No description provided.

[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

Merging #4031 into master will decrease coverage by 0.46%.
The diff coverage is 39.75%.

@@            Coverage Diff             @@
##           master    #4031      +/-   ##
==========================================
- Coverage   62.23%   61.77%   -0.47%     
==========================================
  Files         221      224       +3     
  Lines       16321    16634     +313     
  Branches     2762     2811      +49     
==========================================
+ Hits        10158    10276     +118     
- Misses       5669     5860     +191     
- Partials      494      498       +4     

Flag	Coverage Δ
unittests	61.77% <39.75%> (-0.47%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
mmdet/core/utils/misc.py	100.00% <ø> (+33.33%)	⬆️
mmdet/models/dense_heads/atss_head.py	27.96% <0.00%> (-0.24%)	⬇️
mmdet/models/dense_heads/rpn_head.py	84.93% <0.00%> (ø)
mmdet/models/dense_heads/vfnet_head.py	31.40% <31.40%> (ø)
mmdet/datasets/coco.py	45.60% <50.00%> (-0.16%)	⬇️
mmdet/apis/test.py	13.51% <66.66%> (+0.66%)	⬆️
mmdet/models/losses/varifocal_loss.py	87.87% <87.87%> (ø)
mmdet/core/utils/__init__.py	100.00% <100.00%> (ø)
mmdet/models/dense_heads/__init__.py	100.00% <100.00%> (ø)
mmdet/models/detectors/__init__.py	100.00% <100.00%> (ø)
... and 10 more

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[OpenMMLab-Assistant-007]

Hi!
@AemikaChow
First of all, we want to express our gratitude for your significant PR in the OpenMMLab project. Your contribution is highly appreciated, and we are grateful for your efforts in helping improve this open-source project during your personal time. We believe that many developers will benefit from your PR.

We would also like to invite you to join our Special Interest Group (SIG) private channel on Discord, where you can share your experiences, ideas, and build connections with like-minded peers. To join the SIG channel, simply message moderator— OpenMMLab on Discord or briefly share your open-source contributions in the #introductions channel and we will assist you. Look forward to seeing you there! Join us ：https://discord.gg/UjgXkPWNqA

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Thank you again for your contribution❤