codegen: Remove old ptr32 attribute
codegen: Remove old ptr32 attribute

This attribute is not used in code.

Signed-off-by: Frediano Ziglio <55d48b080b2e443e395cde84d2c83b135a4ff48e@redhat.com>

fgouget/spice-protocol,fgouget/spice-protocol,vdiot/spice-protocol,fgouget/spice-protocol,vdiot/spice-protocol,SPICE/spice-protocol,SPICE/spice-protocol,vdiot/spice-protocol,SPICE/spice-protocol