pkt_sched: Remove CONFIG_NET_SCH_RR

Commit d62733c8e437fdb58325617c4b3331769ba82d70
([SCHED]: Qdisc changes and sch_rr added for multiqueue)
added a NET_SCH_RR option that was unused since the code
went unconditionally into sch_prio.

Reported-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/sched/Kconfig

@@ -106,17 +106,6 @@ config NET_SCH_PRIO
 	  To compile this code as a module, choose M here: the
 	  module will be called sch_prio.
 
-config NET_SCH_RR
-	tristate "Multi Band Round Robin Queuing (RR)"
-	select NET_SCH_PRIO
-	---help---
-	  Say Y here if you want to use an n-band round robin packet
-	  scheduler.
-
-	  The module uses sch_prio for its framework and is aliased as
-	  sch_rr, so it will load sch_prio, although it is referred
-	  to using sch_rr.
-
 config NET_SCH_RED
 	tristate "Random Early Detection (RED)"
 	---help---