Remove bignum check from save_history #4020

Job	Run time
lint	8s
Debug compatibility test	5m 53s
ruby-versions / Generate Ruby versions	2s
rake test 2.7 (latest reline)	1m 29s
vterm-yamatanooroti 2.7 (latest reline)	42s
rake test 2.7	1m 37s
vterm-yamatanooroti 2.7	52s
rake test 3.0 (latest reline)	1m 26s
vterm-yamatanooroti 3.0 (latest reline)	35s
rake test 3.0	1m 26s
vterm-yamatanooroti 3.0	28s
rake test 3.1 (latest reline)	1m 25s
vterm-yamatanooroti 3.1 (latest reline)	31s
rake test 3.1	1m 31s
vterm-yamatanooroti 3.1	38s
rake test 3.2 (latest reline)	1m 20s
vterm-yamatanooroti 3.2 (latest reline)	31s
rake test 3.2	1m 26s
vterm-yamatanooroti 3.2	29s
rake test 3.3 (latest reline)	1m 33s
vterm-yamatanooroti 3.3 (latest reline)	33s
rake test 3.3	1m 23s
vterm-yamatanooroti 3.3	49s
vterm-yamatanooroti head (latest reline)	40s
rake test head (latest reline)	1m 46s
vterm-yamatanooroti head	28s
rake test head	1m 48s
rake test truffleruby-head (latest reline)	2m 57s
rake test truffleruby-head	2m 39s
	37m 5s

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