81-test_cmp_cli.t: Stop unlinking test output files according to #11080
81-test_cmp_cli.t: Stop unlinking test output files according to #11080

Reviewed-by: Tim Hudson <eb0be8e447f673b41b10eda09d63cd72526b0a42@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/12655)

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl