remove unused

rust/src/system/epoll.rs

@@ -32,7 +32,6 @@ impl Event {
 
 pub struct EPoll {
     fd: RawFd,
-    events: PollEvents,
 }
 
 impl EPoll {
@@ -41,7 +40,6 @@ impl EPoll {
             -1 => Err(Error::last_os_error()),
             fd => Ok(EPoll {
                 fd,
-                events: PollEvents::new(),
             })
         }
     }

rust/src/system/errno.rs

@@ -16,10 +16,6 @@ impl Error {
     pub fn last_os_error() -> Error {
         Error(unsafe { *__errno_location() })
     }
-
-    pub fn errno(self) -> i32 {
-        self.0
-    }
 }
 
 impl From<io::Error> for Error {