Remove parentheses of return.

Since return is inconsistent, I removed unnecessary parentheses and
unified them.

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/4541)

apps/ts.c

diff --git a/apps/ts.c b/apps/ts.c
index 5e7729e..96da50e 100644
--- a/apps/ts.c
+++ b/apps/ts.c
@@ -320,7 +320,7 @@
     X509_VERIFY_PARAM_free(vpm);
     NCONF_free(conf);
     OPENSSL_free(password);
-    return (ret);
+    return ret;
 }
 
 /*