devlink: Remove unused function devlink_rate_nodes_destroy

The previous patch removed the last usage of the function
devlink_rate_nodes_destroy(). Thus, remove this function from devlink
API.
Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

include/net/devlink.h

@@ -1571,7 +1571,6 @@ void devlink_port_attrs_pci_sf_set(struct devlink_port *devlink_port,
 				   bool external);
 int devlink_rate_leaf_create(struct devlink_port *port, void *priv);
 void devlink_rate_leaf_destroy(struct devlink_port *devlink_port);
-void devlink_rate_nodes_destroy(struct devlink *devlink);
 void devlink_port_linecard_set(struct devlink_port *devlink_port,
 			       struct devlink_linecard *linecard);
 struct devlink_linecard *

net/core/devlink.c

@@ -10095,24 +10095,6 @@ void devl_rate_nodes_destroy(struct devlink *devlink)
 }
 EXPORT_SYMBOL_GPL(devl_rate_nodes_destroy);
 
-/**
- * devlink_rate_nodes_destroy - destroy all devlink rate nodes on device
- *
- * @devlink: devlink instance
- *
- * Unset parent for all rate objects and destroy all rate nodes
- * on specified device.
- *
- * Context: Takes and release devlink->lock <mutex>.
- */
-void devlink_rate_nodes_destroy(struct devlink *devlink)
-{
-	mutex_lock(&devlink->lock);
-	devl_rate_nodes_destroy(devlink);
-	mutex_unlock(&devlink->lock);
-}
-EXPORT_SYMBOL_GPL(devlink_rate_nodes_destroy);
-
 /**
  *	devlink_port_linecard_set - Link port with a linecard
  *