Remove redundant test in acquire_cred_from()

In case the cred_store type is KRB5_CS_PASSWORD_URN and the desired_name
is not set, its value is tested twice while the first test sends the
program counter to the end of the function.

This commit removes the second test, because it cannot be true.

src/lib/gssapi/krb5/acquire_cred.c

@@ -1283,8 +1283,8 @@ acquire_cred_from(OM_uint32 *minor_status, const gss_name_t desired_name,
             ret = GSS_S_BAD_NAME;
             goto out;
         }
-        if (cred_usage == GSS_C_ACCEPT || desired_name == GSS_C_NO_NAME ||
-            ccache != NULL || client_keytab != NULL) {
+        if (cred_usage == GSS_C_ACCEPT || ccache != NULL ||
+            client_keytab != NULL) {
             *minor_status = (OM_uint32)G_BAD_USAGE;
             ret = GSS_S_FAILURE;
             goto out;