virsh: Don't shadow global variable "remove" in cmdMetadata
virsh: Don't shadow global variable "remove" in cmdMetadata

Some systems apparently have a global variable/function called remove
and thus break compilation of virsh-domain.c. Rename the variable to
avoid this.

Reported by GuanQiang.

jardasgit/libvirt,jfehlig/libvirt,cbosdo/libvirt,cbosdo/libvirt,olafhering/libvirt,andreabolognani/libvirt,datto/libvirt,jfehlig/libvirt,eskultety/libvirt,datto/libvirt,crobinso/libvirt,zhlcindy/libvirt-1.1.4-maintain,libvirt/libvirt,cbosdo/libvirt,andreabolognani/libvirt,shugaoye/libvirt,elmarco/libvirt,taget/libvirt,datto/libvirt,cbosdo/libvirt,jardasgit/libvirt,shugaoye/libvirt,nertpinx/libvirt,elmarco/libvirt,rlaager/libvirt,datto/libvirt,libvirt/libvirt,elmarco/libvirt,zippy2/libvirt,VenkatDatta/libvirt,zippy2/libvirt,olafhering/libvirt,rlaager/libvirt,zippy2/libvirt,elmarco/libvirt,nertpinx/libvirt,taget/libvirt,fabianfreyer/libvirt,shugaoye/libvirt,agx/libvirt,jfehlig/libvirt,nertpinx/libvirt,VenkatDatta/libvirt,libvirt/libvirt,VenkatDatta/libvirt,agx/libvirt,taget/libvirt,taget/libvirt,datto/libvirt,shugaoye/libvirt,crobinso/libvirt,fabianfreyer/libvirt,zhlcindy/libvirt-1.1.4-maintain,zhlcindy/libvirt-1.1.4-maintain,olafhering/libvirt,rlaager/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,eskultety/libvirt,VenkatDatta/libvirt,crobinso/libvirt,fabianfreyer/libvirt,agx/libvirt,rlaager/libvirt,agx/libvirt,nertpinx/libvirt,taget/libvirt,shugaoye/libvirt,cbosdo/libvirt,zippy2/libvirt,jardasgit/libvirt,jardasgit/libvirt,zhlcindy/libvirt-1.1.4-maintain,jardasgit/libvirt,VenkatDatta/libvirt,fabianfreyer/libvirt,olafhering/libvirt,elmarco/libvirt,nertpinx/libvirt,rlaager/libvirt,zhlcindy/libvirt-1.1.4-maintain,andreabolognani/libvirt,jfehlig/libvirt,libvirt/libvirt,eskultety/libvirt,crobinso/libvirt,eskultety/libvirt,agx/libvirt,andreabolognani/libvirt,eskultety/libvirt