refactor: clippy lints

db/src/models/event_for_calendar.rs

@@ -58,12 +58,12 @@ impl EventForCalendar {
                 assignments: record
                     .assignments
                     .as_ref()
-                    .and_then(|f| Some(f.to_vec()))
+                    .map(|f| f.to_vec())
                     .unwrap_or_default(),
                 vehicle_assignments: record
                     .vehicles
                     .as_ref()
-                    .and_then(|f| Some(f.to_vec()))
+                    .map(|f| f.to_vec())
                     .unwrap_or_default(),
             })
             .collect();

web/src/endpoints/availability/put_cross_areal.rs

@@ -64,7 +64,7 @@ async fn handle_cross_areal(
     let assignments_for_availability =
         Assignment::read_all_by_availability(pool.get_ref(), availability.id).await?;
 
-    if !cross_areal && assignments_for_availability.len() != 0 {
+    if !cross_areal && !assignments_for_availability.is_empty() {
         let trigger = json!({
             "showToast": {
                 "type": "danger",

web/src/mail/notify_planned.rs

@@ -25,7 +25,7 @@ impl Mailer {
             &self.hostname,
             &user.name,
             &user.email,
-            &assigned_function,
+            assigned_function,
             event,
         )?;
         self.transport.send(message).await?;

web/src/mail/notify_unplanned.rs

@@ -25,7 +25,7 @@ impl Mailer {
             &self.hostname,
             &user.name,
             &user.email,
-            &assigned_function,
+            assigned_function,
             event,
         )?;
         self.transport.send(message).await?;

web/src/utils/password_change/builder.rs

@@ -49,7 +49,7 @@ where
         self
     }
 
-    pub fn build<'a>(&'a mut self) -> PasswordChange<'a, T> {
+    pub fn build(&mut self) -> PasswordChange<T> {
         PasswordChange {
             pool: self.pool,
             user_id: self.user_id,