kernel/cgroup: Remove the unused variable climit

kernel/cgroup: Remove the unused variable climit

Variable climit is not effectively used, so delete it.

kernel/cgroup/dmem.c:302:23: warning: variable ‘climit’ set but not used.

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=13512
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20250114062804.5092-1-jiapeng.chong@linux.alibaba.com
Signed-off-by: Maxime Ripard <mripard@kernel.org>