CA-42495: Strip blktap related lines from xen-backend.rules
CA-42495: Strip blktap related lines from xen-backend.rules

No semantic difference, but was pulled into
blktap.hg/control/blktap.rules, since blktap.hg 527:0ec5f9b62433.

Signed-off-by: Daniel Stodden <05f14ed2a2851619d24030f51bb8d7a9bac70353@citrix.com>

djs55/squeezed,koushikcgit/xcp-rrdd,johnelse/xcp-rrdd,johnelse/xcp-rrdd,robhoes/squeezed,djs55/xcp-networkd,djs55/xcp-rrdd,djs55/xcp-networkd,simonjbeaumont/xcp-rrdd,djs55/xcp-rrdd,simonjbeaumont/xcp-rrdd,koushikcgit/xcp-networkd,koushikcgit/xcp-rrdd,koushikcgit/xcp-rrdd,sharady/xcp-networkd,koushikcgit/xcp-networkd,sharady/xcp-networkd