fix some lints

packages/html/src/events/drag.rs

@@ -1,5 +1,3 @@
-use std::any::Any;
-
 use dioxus_core::Event;
 
 use crate::MouseData;

packages/html/src/events/form.rs

@@ -1,4 +1,4 @@
-use std::{collections::HashMap, fmt::Debug, sync::Arc};
+use std::{collections::HashMap, fmt::Debug};
 
 use dioxus_core::Event;
 

packages/html/src/transit.rs

@@ -115,7 +115,7 @@ fn test_back_and_forth() {
 }
     "#;
 
-    let p: HtmlEvent = serde_json::from_str(o).unwrap();
+    let _: HtmlEvent = serde_json::from_str(o).unwrap();
 }
 
 // pub fn decode_event(value: ) -> Option<Rc<dyn Any>> {