Removed the get_cause function since it is redundant.

src/c/errno.rs

@@ -7,7 +7,7 @@ use binding::CInt;
 /// This can be used for clearing an error.
 pub const NO_ERROR: CInt = 0;
 
-/// Include the generated C error values.
+// Include the generated C error values.
 include!(concat!(env!("OUT_DIR"), "/errno_values.rs"));
 
 
@@ -157,11 +157,6 @@ impl Error for CError
             { "Detected an Error not handled by CError" }
       }
    }
-
-   fn get_cause(&self) -> Option<&Error>
-   {
-      None
-   }
 }