Revert of XPS, DM: add SkDocument::CreateXPS (patchset #8 id:310001 of https://codereview.chromium.org/963953002/)
Reason for revert:
breaking iOS build.
Original issue's description:
> XPS, DM: add SkDocument::CreateXPS
>
> - SkDocument::CreateXPS() function added, returns NULL on non-Windows OS.
>
> - DM: (Windows only) an XPSSink is added, fails on non-Windows OS
>
> - DM: Common code for PDFSink::draw and XPSSink::draw are factored into
> draw_skdocument static function.
>
> - SkDocument_XPS (Windows only) implementation of SkDocument via
> SkXPSDevice.
>
> - SkDocument_XPS_None (non-Windows) returns NULL for
> SkDocument::CreateXPS().
>
> - gyp/xps.gyp refactored.
>
> - SkXPSDevice::drawTextOnPath removed (see http://crrev.com/925343003 )
>
> - SkXPSDevice::drawPath supports conics via SkAutoConicToQuads.
>
> NOPRESUBMIT=true
>
> Committed: https://skia.googlesource.com/skia/+/00d39bcbfc8394a9b48b86b04ab06ec19091fa43
TBR=reed@google.com,bungeman@google.com,mtklein@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
Review URL: https://codereview.chromium.org/978443002
c2574f3657