Remove unused array #58

Job	Run time
ruby-versions / Generate Ruby versions	3s
test (2.5, ubuntu-latest)	38s
test (2.5, macos-latest)	1m 40s
test (2.5, windows-latest)	3m 38s
test (2.6, ubuntu-latest)	40s
test (2.6, macos-latest)	1m 27s
test (2.6, windows-latest)	2m 36s
test (2.7, ubuntu-latest)	40s
test (2.7, macos-latest)	1m 29s
test (2.7, windows-latest)	2m 8s
test (3.0, ubuntu-latest)	17s
test (3.0, macos-latest)	28s
test (3.0, windows-latest)	1m 30s
test (3.1, ubuntu-latest)	19s
test (3.1, macos-latest)	28s
test (3.1, windows-latest)	1m 32s
test (3.2, ubuntu-latest)	18s
test (3.2, macos-latest)	27s
test (3.2, windows-latest)	1m 29s
test (head, ubuntu-latest)	14s
test (head, macos-latest)	28s
test (head, windows-latest)	1m 43s
test (jruby, ubuntu-latest)	1m 13s
test (jruby, macos-latest)	2m 0s
test (jruby, windows-latest)	1m 58s
test (jruby-head, ubuntu-latest)	1m 14s
test (jruby-head, macos-latest)	2m 2s
test (jruby-head, windows-latest)	1m 53s
test (windows-latest, ucrt)	1m 8s
test (windows-latest, mingw)	1m 41s
test (windows-latest, mswin)	2m 38s
	39m 59s

Provide feedback