[SPARC64]: Kill cpudata->idle_volume.

Set, but never used.

We used to use this for dynamic IRQ retargetting, but that
code died a long time ago.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc64/kernel/process.c b/arch/sparc64/kernel/process.c
index d00cb7a..1ab8283 100644
--- a/arch/sparc64/kernel/process.c
+++ b/arch/sparc64/kernel/process.c
@@ -56,6 +56,8 @@
 {
 }
 
+
+
 #ifndef CONFIG_SMP
 
 /*
@@ -104,19 +106,11 @@
 
 	while(1) {
 		if (need_resched()) {
-			cpuinfo->idle_volume = 0;
 			preempt_enable_no_resched();
 			schedule();
 			preempt_disable();
 			check_pgt_cache();
 		}
-		cpuinfo->idle_volume++;
-
-		/* The store ordering is so that IRQ handlers on
-		 * other cpus see our increasing idleness for the buddy
-		 * redistribution algorithm.  -DaveM
-		 */
-		membar_storeload_storestore();
 	}
 }