[libvirt] [PATCH 2/2]: Remove getURI internal driver call

This patch removes the internal getURI() driver callback. It was *never* overridden by any of the drivers, so it seems kind of pointless (I even checked the "in-progress" VirtualBox, OpenNebula, and Power Hypervisor drivers). In addition, the code to actually use it in src/libvirt.c:virConnectGetURI() was buggy; if a driver did decide to have their own callback, then their callback would be called, and then immediately overwritten by the generic stuff. This wouldn't do what the driver expected, and would also probably leak memory. Just rip out this internal callback; if a future driver ever needs it, we can add it back in. Signed-off-by: Chris Lalancette <clalance(a)redhat.com&gt;