util: buffer: Remove virBufferError

The function now does not return an error so we can drop it fully.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>

tools/virsh-domain-monitor.c

@@ -2410,12 +2410,6 @@ cmdDomIfAddr(vshControl *ctl, const vshCmd *cmd)
                               type, iface->addrs[j].addr,
                               iface->addrs[j].prefix);
 
-            if (virBufferError(&buf)) {
-                virBufferFreeAndReset(&buf);
-                virReportOOMError();
-                goto cleanup;
-            }
-
             ip_addr_str = virBufferContentAndReset(&buf);
 
             if (!ip_addr_str)