mm: remove the leftovers of noswapaccount

In commit a2c8990aed5ab ("memsw: remove noswapaccount kernel parameter"),
Michal forgot to remove some left pieces of noswapaccount in the tree,
this patch removes them all.

Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/init/Kconfig b/init/Kconfig
index e20aa31..d627783 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -673,7 +673,7 @@
 	  be careful about enabling this. When memory resource controller
 	  is disabled by boot option, this will be automatically disabled and
 	  there will be no overhead from this. Even when you set this config=y,
-	  if boot option "noswapaccount" is set, swap will not be accounted.
+	  if boot option "swapaccount=0" is set, swap will not be accounted.
 	  Now, memory usage of swap_cgroup is 2 bytes per entry. If swap page
 	  size is 4096bytes, 512k per 1Gbytes of swap.
 config CGROUP_MEM_RES_CTLR_SWAP_ENABLED
@@ -688,7 +688,7 @@
 	  parameter should have this option unselected.
 	  For those who want to have the feature enabled by default should
 	  select this option (if, for some reason, they need to disable it
-	  then noswapaccount does the trick).
+	  then swapaccount=0 does the trick).
 
 config CGROUP_PERF
 	bool "Enable perf_event per-cpu per-container group (cgroup) monitoring"