Update quaternion.rs

Author: hapenia

godot-core/src/builtin/quaternion.rs

@@ -345,12 +345,3 @@ impl Neg for Quaternion {
         Self::new(-self.x, -self.y, -self.z, -self.w)
     }
 }
-
-impl std::fmt::Display for Quaternion {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        // godot output be like:
-        // `(x, y, z, w)`
-        // enhanced with type hint `Quat`
-        write!(f, "Quat({}, {}, {}, {})", self.x, self.y, self.z, self.w)
-    }
-}