Clean up todos and minor audio backend changes

src/bot/commands/music/playing.rs

@@ -118,7 +118,6 @@ pub fn run(ctx: Context, command: ApplicationCommandInteraction) -> CommandOutpu
       Some(user) => user,
       None => {
         // This shouldn't happen
-        // TODO: Test if this can no longer happen
 
         error!("Could not find user with id {}", owner);
 

src/bot/mod.rs

@@ -1,3 +1,2 @@
-// TODO: Check all image urls in embed responses
 pub mod commands;
 pub mod events;