CA-157286: Remove unused non-libxl PCI attach functions
CA-157286: Remove unused non-libxl PCI attach functions

Signed-off-by: Si Beaumont <a0992b7f1f450b4c7716d34b81a2d6f0877ae11a@citrix.com>

koushikcgit/xenopsd,koushikcgit/xenopsd,thomassa/xenopsd,euanh/xenopsd,djs55/xenopsd,koushikcgit/xenopsd,johnelse/xenopsd,thomassa/xenopsd,johnelse/xenopsd,euanh/xenopsd,djs55/xenopsd,euanh/xenopsd,johnelse/xenopsd,djs55/xenopsd,thomassa/xenopsd