sr_session_send_meta(): Drop unneeded check.

As of right now, sr_config_new() "cannot fail" and will never return NULL.

src/hwdriver.c

@@ -571,6 +571,12 @@ SR_PRIV void sr_hw_cleanup_all(const struct sr_context *ctx)
  *
  * A floating reference can be passed in for data.
  *
+ * @param key The config key to use.
+ * @param data The GVariant data to use.
+ *
+ * @return The newly allocated struct sr_config. This function is assumed
+ *         to never fail.
+ *
  * @private
  */
 SR_PRIV struct sr_config *sr_config_new(uint32_t key, GVariant *data)

src/session.c

@@ -1092,8 +1092,6 @@ SR_PRIV int sr_session_send_meta(const struct sr_dev_inst *sdi,
 	int ret;
 
 	cfg = sr_config_new(key, var);
-	if (!cfg)
-		return SR_ERR;
 
 	memset(&meta, 0, sizeof(meta));