commands: strip lifetimes

src/commands/queue/add.rs

@@ -14,7 +14,7 @@ pub struct AddRequest {
     position: Option<SongPosition>,
 }
 
-impl CommandRequest<'_> for AddRequest {
+impl CommandRequest for AddRequest {
     const COMMAND: &'static str = "add";
 
     fn into_request_enum(self) -> crate::Request {
@@ -60,7 +60,7 @@ impl CommandRequest<'_> for AddRequest {
 
 empty_command_response!(Add);
 
-impl Command<'_, '_> for Add {
+impl Command for Add {
     type Request = AddRequest;
     type Response = AddResponse;
 }