MINOR don't run subsite filter on delete queries (from r98235)
MINOR don't run subsite filter on delete queries (from r98235)

danaenz/silverstripe-subsites,dnadesign/silverstripe-subsites,dnadesign/silverstripe-subsites,wernerkrauss/silverstripe-subsites,silverstripe/silverstripe-subsites,silverstripe/silverstripe-subsites,danaenz/silverstripe-subsites,wernerkrauss/silverstripe-subsites,mikenz/silverstripe-simplesubsites,petpack/silverstripe-subsites,petpack/silverstripe-subsites,mikenz/silverstripe-simplesubsites,mandrew/silverstripe-subsites,mandrew/silverstripe-subsites