chore: remove platform FingerId

The same as for `WindowId`.

src/platform_impl/orbital/mod.rs

@@ -99,16 +99,6 @@ impl TimeSocket {
 #[derive(Default, Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub(crate) struct PlatformSpecificEventLoopAttributes {}
 
-#[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
-pub struct FingerId;
-
-impl FingerId {
-    #[cfg(test)]
-    pub const fn dummy() -> Self {
-        FingerId
-    }
-}
-
 #[derive(Clone, Copy, Debug, Default, Eq, PartialEq)]
 pub struct PlatformSpecificWindowAttributes;