Check that removed disks have enabled type
Check that removed disks have enabled type

Instead of checking if the instance disk template is enabled in the
removal, only the device type is necessary.

Signed-off-by: Aaron Karper <99cc1031546340b2b8ced5fe338b5890677a56ca@google.com>
Reviewed-by: Michele Tartara <05f7077a2c6cbbdc4af4ba42e3ef89a0df846179@google.com>

bitemyapp/ganeti,leshchevds/ganeti,yiannist/ganeti,ganeti/ganeti,yiannist/ganeti,onponomarev/ganeti,ganeti/ganeti,andir/ganeti,mbakke/ganeti,bitemyapp/ganeti,yiannist/ganeti,andir/ganeti,mbakke/ganeti,grnet/snf-ganeti,leshchevds/ganeti,grnet/snf-ganeti,mbakke/ganeti,andir/ganeti,dimara/ganeti,dimara/ganeti,onponomarev/ganeti,ganeti/ganeti,leshchevds/ganeti