build

Remove ruby-core workflow #4335

Job	Run time
lint	9s
Debug compatibility test	6m 3s
ruby-versions / Generate Ruby versions	2s
vterm-yamatanooroti 2.7 (latest reline)	48s
rake test 2.7 (latest reline)	1m 42s
vterm-yamatanooroti 2.7	1m 33s
vterm-yamatanooroti 3.0 (latest reline)	36s
rake test 2.7	1m 36s
rake test 3.0 (latest reline)	1m 40s
vterm-yamatanooroti 3.0	31s
rake test 3.0	1m 33s
vterm-yamatanooroti 3.1 (latest reline)	36s
rake test 3.1 (latest reline)	1m 39s
vterm-yamatanooroti 3.1	31s
rake test 3.1	1m 41s
vterm-yamatanooroti 3.2 (latest reline)	30s
rake test 3.2 (latest reline)	1m 36s
vterm-yamatanooroti 3.2	34s
rake test 3.2	1m 37s
vterm-yamatanooroti 3.3 (latest reline)	32s
rake test 3.3 (latest reline)	1m 52s
vterm-yamatanooroti 3.3	1m 13s
rake test 3.3	1m 44s
vterm-yamatanooroti 3.4 (latest reline)	32s
rake test 3.4 (latest reline)	2m 10s
vterm-yamatanooroti 3.4	1m 10s
rake test 3.4	2m 6s
vterm-yamatanooroti head (latest reline)	43s
rake test head (latest reline)	12s
rake test head	8s
vterm-yamatanooroti head	32s
	37m 51s

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