Remove unused layer module in iced_graphics

graphics/src/layer.rs

@@ -1,47 +0,0 @@
-pub trait Layer {
-    type Cache;
-
-    fn new() -> Self;
-
-    fn clear(&mut self);
-}
-
-pub struct Recorder<T: Layer> {
-    layers: Vec<T>,
-    caches: Vec<T::Cache>,
-    stack: Vec<Kind>,
-    current: usize,
-}
-
-enum Kind {
-    Fresh(usize),
-    Cache(usize),
-}
-
-impl<T: Layer> Recorder<T> {
-    pub fn new() -> Self {
-        Self {
-            layers: vec![Layer::new()],
-            caches: Vec::new(),
-            stack: Vec::new(),
-            current: 0,
-        }
-    }
-
-    pub fn fill_quad(&mut self) {}
-
-    pub fn push_cache(&mut self, cache: T::Cache) {
-        self.caches.push(cache);
-    }
-
-    pub fn clear(&mut self) {
-        self.caches.clear();
-        self.stack.clear();
-
-        for mut layer in self.layers {
-            layer.clear();
-        }
-
-        self.current = 0;
-    }
-}