test: make test-http-unix-socket use common.PIPE
test: make test-http-unix-socket use common.PIPE

Don't unlink the socket, that's the responsibility of libuv and/or node.

dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node