Fixed warnings from cargo

src/manifest/mod.rs

@@ -13,8 +13,6 @@ use serde::{Deserialize, Serialize};
 const DEFAULT_MANIFEST: &'static str = include_str!("../../manifest.default.json");
 
 
-pub type SongName = String;
-pub type Genre = HashMap<SongName, song::Song>;
 
 #[allow(non_camel_case_types)]
 #[derive(Debug, Serialize, Deserialize, Clone, Default)]
@@ -43,7 +41,7 @@ impl Manifest {
     pub fn get_format(&self) -> &Format {
         &self.format
     }
-    pub fn add_song(&mut self, playlist_name: &String, name: SongName, song: Song) -> Option<Song> {
+    pub fn add_song(&mut self, playlist_name: &String, name: String, song: Song) -> Option<Song> {
         self.get_playlist_mut(playlist_name)?.add_song(name, song)
     }
     pub fn get_song(&self, playlist_name: &String, name: &String) -> Option<&Song> {

src/manifest/playlist.rs

@@ -13,9 +13,6 @@ pub struct Playlist {
 
 
 impl Playlist {
-    pub fn new() -> Self {
-        Self { ..Default::default() }
-    }
 
     pub fn add_song(&mut self, name: String, song: Song) -> Option<Song> {
         self.songs.insert(name, song)
@@ -32,7 +29,8 @@ impl Playlist {
     pub fn get_songs(&self) -> &HashMap<String, Song> {
         &self.songs
     }
-
+    
+    #[allow(dead_code)]
     pub fn get_songs_mut(&mut self) -> &mut HashMap<String, Song> {
         &mut self.songs
     }