ld_so: remove access dead code

src/ld_so/access.rs

@@ -1,5 +1,3 @@
-#[cfg(target_os = "redox")]
-use crate::header::unistd::{F_OK, R_OK, W_OK, X_OK};
 use crate::{
     c_str::{CStr, CString},
     error::Errno,
@@ -7,8 +5,6 @@ use crate::{
 };
 
 pub fn accessible(path: &str, mode: c_int) -> Result<(), Errno> {
-    let path_c = CString::new(path.as_bytes()).unwrap(); /*.map_err(|err| {
-                                                             Error::Malformed(format!("invalid path '{}': {}", path, err))
-                                                         })?;*/
+    let path_c = CString::new(path.as_bytes()).unwrap();
     unsafe { Sys::access(CStr::from_ptr(path_c.as_ptr()), mode) }
 }