Remove unused

server/objects/mediaTypes/Book.js

@@ -100,9 +100,6 @@ class Book {
     }
     return total
   }
-  get hasMediaEntities() {
-    return !!this.tracks.length || this.ebookFile
-  }
   get includedAudioFiles() {
     return this.audioFiles.filter((af) => !af.exclude)
   }
@@ -129,8 +126,6 @@ class Book {
 
   update(payload) {
     const json = this.toJSON()
-    delete json.audiobooks // do not update media entities here
-    delete json.ebooks
 
     let hasUpdates = false
     for (const key in json) {

server/objects/mediaTypes/Podcast.js

@@ -124,9 +124,6 @@ class Podcast {
     this.episodes.forEach((ep) => (total += ep.size))
     return total
   }
-  get hasMediaEntities() {
-    return !!this.episodes.length
-  }
   get duration() {
     let total = 0
     this.episodes.forEach((ep) => (total += ep.duration))