completely remove code removing 15 minutes at the end of shift (actually this…

completely remove code removing 15 minutes at the end of shift (actually this code was even buggy as -15 min operation was done twice)
2 jobs from migration-v12 in 0 seconds (queued for 67 minutes 9 seconds)
Status Job ID Name Coverage
  Test
failed #8379
lint:js

failed #8380
unit:django

 
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Test lint:js
No job trace