cmp: remove NULL check.
Instead appease coverity by marking as a false positive.
Coverity is confused by the engine reference counting.
@@ -3186,7 +3186,6 @@ int cmp_main(int argc, char **argv)
X509_STORE_free(OSSL_CMP_CTX_get_certConf_cb_arg(cmp_ctx));
OSSL_CMP_CTX_free(cmp_ctx);
X509_VERIFY_PARAM_free(vpm);
- if (engine != NULL) /* workaround for Coverity false positive */
release_engine(engine);
NCONF_free(conf); /* must not do as long as opt_... variables are used */
