Replace include guards with #pragma once in drawinglayer headers under attribute/, geometry/, processor2d/, processor3d/, tools/. Change-Id: Ib638a2602ecb60d62dafb556f480b0955c33858c Reviewed-on: https://gerrit.libreoffice.org/c/core/+/204556 Reviewed-by: Julien Nabet <serval2412@yahoo.fr> Tested-by: Jenkins