workqueue: Remove unused WORK_NO_COLOR

mainline inclusion
from mainline-v5.15-rc1
commit bdb0a654
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7LRJF

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bdb0a6548d2233dada752109a71bcf4c9b8ae6d6



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WORK_NO_COLOR has no user now, just remove it.

Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Zeng Heng <zengheng4@huawei.com>