Delete test/net/imap/test_data_lite.rb #2889

Job	Run time
ruby-versions / Generate Ruby versions	4s
build (3.4 / ubuntu-latest)	48s
build (3.2 / ubuntu-latest)	48s
build (3.2 / windows-latest)	2m 17s
build (3.2 / macos-latest)	55s
build (4.0 / ubuntu-latest)	58s
build (3.3 / ubuntu-latest)	46s
build (3.4 / macos-latest)	31s
build (3.3 / macos-latest)	30s
build (4.0 / macos-latest)	45s
build (4.0 / windows-latest)	2m 6s
build (3.4 / windows-latest)	2m 5s
build (3.3 / windows-latest)	1m 55s
build (head / ubuntu-latest)	55s
build (head / windows-latest)	2m 3s
build (truffleruby-head / ubuntu-latest)	1m 46s
build (head / macos-latest)	34s
	19m 46s

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