cgroups: remove a redundant local variable
cgroups: remove a redundant local variable

This is a trivial change to get rid of an unneeded local variable.

maemo-foss/maemo-multimedia-ohm-plugins-misc,jusa/ohm-plugins-misc,maemo-foss/maemo-multimedia-ohm-plugins-misc,maemo-foss/maemo-multimedia-ohm-plugins-misc,jusa/ohm-plugins-misc,tswindell/ohm-plugins-misc,tswindell/ohm-plugins-misc,jusa/ohm-plugins-misc,jusa/ohm-plugins-misc,tswindell/ohm-plugins-misc