seat: uniformly convert scroll steps to scroll px

src/tree.rs

@@ -9,7 +9,6 @@ use {
         },
         rect::Rect,
         render::Renderer,
-        state::DeviceHandlerData,
         utils::numcell::NumCell,
         xkbcommon::ModifierState,
     },
@@ -185,13 +184,7 @@ pub trait Node: 'static {
         let _ = serial;
     }
 
-    fn node_on_axis_event(
-        self: Rc<Self>,
-        dev: &DeviceHandlerData,
-        seat: &Rc<WlSeatGlobal>,
-        event: &PendingScroll,
-    ) {
-        let _ = dev;
+    fn node_on_axis_event(self: Rc<Self>, seat: &Rc<WlSeatGlobal>, event: &PendingScroll) {
         let _ = seat;
         let _ = event;
     }