Partially revert fd8f8fc to fix #2013

[Xyene]

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[codecov-commenter]

Codecov Report

Base: 46.50% // Head: 46.47% // Decreases project coverage by -0.03% ⚠️

Coverage data is based on head (a34ea0b) compared to base (b676a49).
Patch has no changes to coverable lines.

❗ Current head a34ea0b differs from pull request most recent head 66ac856. Consider uploading reports for the commit 66ac856 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2019      +/-   ##
==========================================
- Coverage   46.50%   46.47%   -0.04%     
==========================================
  Files         236      236              
  Lines       13104    13107       +3     
==========================================
- Hits         6094     6091       -3     
- Misses       7010     7016       +6     

Impacted Files	Coverage Δ
django_2_2_pymysql_patch.py	42.85% <0.00%> (-42.86%)	⬇️
judge/utils/raw_sql.py	28.57% <0.00%> (-1.28%)	⬇️
judge/comments.py	40.86% <0.00%> (ø)
judge/widgets/select2.py	56.66% <0.00%> (ø)
judge/views/api/api_v2.py	47.79% <0.00%> (ø)
judge/views/submission.py	32.21% <0.00%> (ø)

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