tests: fix bhyve build

This file was modified in an editor buffer but not saved prior to
commit e62cb4a9 (which removed virMacAddr::generated), so the bhyve
build would fail.
Signed-off-by: NLaine Stump <laine@laine.org>

tests/bhyvexml2argvmock.c

@@ -17,7 +17,6 @@ void virMacAddrGenerate(const unsigned char prefix[VIR_MAC_PREFIX_BUFLEN],
     addr->addr[3] = 0;
     addr->addr[4] = 0;
     addr->addr[5] = 0;
-    addr->generated = true;
 }
 
 int virNetDevTapCreateInBridgePort(const char *brname ATTRIBUTE_UNUSED,