Remove `cause' method for XSafeError

1 files changed, 1 insertions, 5 deletions

diff --git a/src/safe_x11/mod.rs b/src/safe_x11/mod.rs
index 4a1e029..a65c132 100644
--- a/src/safe_x11/mod.rs
+++ b/src/safe_x11/mod.rs
@@ -58,10 +58,6 @@ impl<'a> error::Error for XSafeError<'a> {
     fn description(&self) -> &str {
         self._description
     }
-
-    fn cause(&self) -> Option<&error::Error> {
-        None
-    }
 }
 
 impl<'a> fmt::Display for XSafeError<'a> {
@@ -102,7 +98,7 @@ pub fn root_window(display: *mut Display) -> Window {
     unsafe { xlib::XDefaultRootWindow(display) }
 }
 
-/// Grab pointer buttons. 
+/// Grab pointer buttons.
 ///
 /// # Example
 ///