net/transport remove error not used

src/net/transport.rs

@@ -37,9 +37,6 @@ pub enum TransportError<TErr> {
     #[error("Transport IO Error: {0}")]
     IoError(#[from] std::io::Error),
 
-    #[error("Socks5 Error: {0}")]
-    Socks5Error(#[from] fast_socks5::SocksError),
-
     #[error("{0}")]
     Other(TErr),
 }