xen_git.bbappend: Removing no longer needed hacks
xen_git.bbappend: Removing no longer needed hacks

Removing already upstreamed or no longer needed hacks. As part of zeus
upgrade we upgraded to xen 4.13

Signed-off-by: Jaewon Lee <1b369288d13b7b5cc9a37dd614e864b90fd18321@xilinx.com>

Xilinx/meta-petalinux,Xilinx/meta-petalinux,Xilinx/meta-petalinux,Xilinx/meta-petalinux,Xilinx/meta-petalinux,Xilinx/meta-petalinux