core: remove external resources once for all

8 jobs for markdown-editor in 23 minutes and 24 seconds (queued for 1 minute and 1 second)
Status Job ID Name Coverage
  Test
passed #2151
black

00:02:55

passed #2152
test

00:20:28

60.0%
failed #2150
black

00:01:11

failed #2149
black

00:01:34

failed #2147
black

00:00:20

failed #2146
black

00:02:47

failed #2148
test

00:00:47

failed #2145
test

00:02:30