[#463] policer: Remove capacity rebalance logic

Current implementation has some quirks. For example,
using only half of object.put.pool_size_remote threads
tells replicator that is node is 50% loaded,
but in reality we could be putting lot's of big objects.

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>

cmd/frostfs-node/object.go

@@ -259,7 +259,6 @@ func addPolicer(c *cfg, keyStorage *util.KeyStorage, clientConstructor *cache.Cl
 		}),
 		policer.WithMaxCapacity(c.cfgObject.pool.replicatorPoolSize),
 		policer.WithPool(c.cfgObject.pool.replication),
-		policer.WithNodeLoader(c),
 	)
 
 	c.workers = append(c.workers, worker{