Fix unused_variables

Author: Mallets

library/std/src/sys/net/connection/unsupported.rs

@@ -103,7 +103,7 @@ impl TcpStream {
         self.0
     }
 
-    pub fn set_hop_limit_v6(&self, limit: u8) -> io::Result<()> {
+    pub fn set_hop_limit_v6(&self, _: u8) -> io::Result<()> {
         self.0
     }
 
@@ -153,7 +153,7 @@ impl TcpListener {
         self.0
     }
 
-    pub fn set_hop_limit_v6(&self, limit: u8) -> io::Result<()> {
+    pub fn set_hop_limit_v6(&self, _: u8) -> io::Result<()> {
         self.0
     }
 
@@ -287,15 +287,15 @@ impl UdpSocket {
         self.0
     }
 
-    pub fn set_hop_limit_v6(&self, limit: u8) -> io::Result<()> {
+    pub fn set_hop_limit_v6(&self, _: u8) -> io::Result<()> {
         self.0
     }
 
     pub fn hop_limit_v6(&self) -> io::Result<u8> {
         self.0
     }
 
-    pub fn set_multicast_hop_limit_v6(&self, limit: u8) -> io::Result<()> {
+    pub fn set_multicast_hop_limit_v6(&self, _: u8) -> io::Result<()> {
         self.0
     }
 

library/std/src/sys/net/connection/xous/tcpstream.rs

@@ -392,7 +392,7 @@ impl TcpStream {
         .map(|res| res[0] as _)?)
     }
 
-    pub fn set_hop_limit_v6(&self, hlim: u8) -> io::Result<()> {
+    pub fn set_hop_limit_v6(&self, _: u8) -> io::Result<()> {
         unimpl!();
     }
 

library/std/src/sys/net/connection/xous/udp.rs

@@ -383,7 +383,7 @@ impl UdpSocket {
         .map(|res| res[0] as _)?)
     }
 
-    pub fn set_hop_limit_v6(&self, hlim: u8) -> io::Result<()> {
+    pub fn set_hop_limit_v6(&self, _: u8) -> io::Result<()> {
         unimpl!();
     }