main/libuv: revert test for udp multicast join
This test is breaking on ppc64le and causes more issues:
https://github.com/libuv/libuv/issues/2468 https://github.com/clearlinux-pkgs/libuv/commit/a4cbe099b2a60d1598f35bcbf6641903c17ba7bf
This test is breaking on ppc64le and causes more issues:
https://github.com/libuv/libuv/issues/2468 https://github.com/clearlinux-pkgs/libuv/commit/a4cbe099b2a60d1598f35bcbf6641903c17ba7bf