test

Remove unnecessary definitions from rbs #1121

Job	Run time
check-misc (head)	11s
steep-check (head)	11s
test-memory (head)	30s
test-windows (head)	2m 13s
test-ruby (head, master)	5m 25s
test-ruby (3.0, master)	5m 23s
test-ruby (2.7, master)	5m 27s
ruby-versions / Generate Ruby versions	2s
test (2.5)	22s
test (2.6)	22s
test (2.7)	24s
test (3.0)	11s
test (3.1)	12s
test (3.2)	13s
test (3.3)	13s
test (head)	9s
	21m 28s

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