remove state generic from a lot of things

src/widget/position/layer.rs

@@ -1,23 +1,23 @@
 use crate::prelude::*;
 
-pub struct LayerOffset<State> {
-    pub inner: WidgetHandle<State>,
+pub struct LayerOffset {
+    pub inner: WidgetHandle,
     pub offset: usize,
 }
 
-impl<State: 'static> Widget<State> for LayerOffset<State> {
-    fn draw(&mut self, painter: &mut Painter<State>) {
+impl Widget for LayerOffset {
+    fn draw(&mut self, painter: &mut Painter) {
         for _ in 0..self.offset {
             painter.next_layer();
         }
         painter.widget(&self.inner);
     }
 
-    fn desired_width(&mut self, ctx: &mut SizeCtx<State>) -> Len {
+    fn desired_width(&mut self, ctx: &mut SizeCtx) -> Len {
         ctx.width(&self.inner)
     }
 
-    fn desired_height(&mut self, ctx: &mut SizeCtx<State>) -> Len {
+    fn desired_height(&mut self, ctx: &mut SizeCtx) -> Len {
         ctx.height(&self.inner)
     }
 }