Remove some unneeded braces

Author: justinlatimer

src/sys/socket/sockopt.rs

@@ -3,7 +3,7 @@ use {Errno, Result};
 use sys::time::TimeVal;
 use libc::{c_int, uint8_t, c_void, socklen_t};
 #[cfg(target_os = "linux")]
-use libc::{sockaddr_in};
+use libc::sockaddr_in;
 use std::mem;
 use std::os::unix::io::RawFd;