the manpages were deleted

Now, it hasn't manpages.
https://github.com/lxde/lxqt-powermanagement/commit/3eda208f9c5c1802fb5e184a5221edeb73f5e7c5
Merge remote-tracking branch 'upstream/master' into patch-1
lxqt-base/lxqt-powermanagement: 9999 (git ver.) now doesn't have document.