Remove byebug from dependencies #1564

Job	Run time
benchmark-default (head)	11m 53s
test (ruby)	1m 3s
test (head)	55s
benchmark-default (ruby)	11m 3s
benchmark-default (truffleruby)	15m 10s
test (truffleruby)	58s
benchmark-graph	58s
benchmark-ractor (head)	6m 54s
benchmark-run-once	1m 24s
benchmark-ractor-only (head)	38s
all-tests	2s
	50m 58s

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