Fix Clippy warning

Author: Thomasdezeeuw

tests/socket.rs

@@ -1334,7 +1334,7 @@ test!(
 test!(keepalive, set_keepalive(true));
 #[cfg(all(feature = "all", any(target_os = "fuchsia", target_os = "linux")))]
 test!(freebind, set_freebind(true));
-#[cfg(all(feature = "all", any(target_os = "linux")))]
+#[cfg(all(feature = "all", target_os = "linux"))]
 test!(IPv6 freebind_ipv6, set_freebind_ipv6(true));
 
 test!(IPv4 ttl, set_ttl(40));