Removed two unused variables

Author: ccesare

src/libstd/sys/redox/os.rs

@@ -30,9 +30,6 @@ use sys_common::mutex::Mutex;
 use sys::{cvt, fd, syscall};
 use vec;
 
-const TMPBUF_SZ: usize = 128;
-static ENV_LOCK: Mutex = Mutex::new();
-
 extern {
     #[link_name = "__errno_location"]
     fn errno_location() -> *mut i32;