Drop a spurious printf in evp_test.c

A spurious printf was added to evp_test.c - probably for debugging
purposes. This actually causes runtime errors in some cases because the
name being printed can be NULL.

Fixes #19814

Reviewed-by: Hugo Landau <hlandau@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/19820)
