CI: remove ubuntu disco

4 jobs for master in 530 minutes and 42 seconds (queued for 4 seconds)
Status Name Job ID Coverage
  Test
passed job_clang_amd64 #4648
amd64

08:50:42

passed job_gcc_amd64 #4649
amd64

03:25:02

failed job_clang_amd64 #4647
amd64

04:26:49

failed job_gcc_amd64 #4646
amd64

04:26:52