Fix +beta clippy warnings

examples/clock/main.rs

@@ -37,5 +37,5 @@ fn build_ui(application: &Application) {
 }
 
 fn current_time() -> String {
-    return format!("{}", Local::now().format("%Y-%m-%d %H:%M:%S"));
+    format!("{}", Local::now().format("%Y-%m-%d %H:%M:%S"))
 }

gdk4/src/event.rs

@@ -170,7 +170,7 @@ macro_rules! define_event {
             }
 
             pub fn upcast_ref(&self) -> &crate::Event {
-                &*self
+                self
             }
         }
     };

gsk4/src/render_node.rs

@@ -118,7 +118,7 @@ macro_rules! define_render_node {
     ($rust_type:ident, $ffi_type:path,  $node_type:path) => {
         impl std::convert::AsRef<crate::RenderNode> for $rust_type {
             fn as_ref(&self) -> &crate::RenderNode {
-                &*self
+                self
             }
         }
 
@@ -142,7 +142,7 @@ macro_rules! define_render_node {
             }
 
             fn upcast_ref(&self) -> &crate::RenderNode {
-                &*self
+                self
             }
         }
 

gtk4/src/expression.rs

@@ -256,7 +256,7 @@ macro_rules! define_expression {
             }
 
             pub fn upcast_ref(&self) -> &crate::Expression {
-                &*self
+                self
             }
         }
 

gtk4/src/param_spec_expression.rs

@@ -58,7 +58,7 @@ impl ParamSpecExpression {
     }
 
     pub fn upcast_ref(&self) -> &ParamSpec {
-        &*self
+        self
     }
 }