[web] Remove empty JavaScript statements

web-src/src/pages/PageArtists.vue

@@ -189,9 +189,7 @@ export default {
         this.$store.commit(types.HIDE_SPOTIFY, value)
       }
     }
-  },
-
-  methods: {}
+  }
 }
 </script>
 

web-src/src/pages/PageAudiobooksAlbums.vue

@@ -69,9 +69,7 @@ export default {
     return {
       albums: new GroupByList()
     }
-  },
-
-  methods: {}
+  }
 }
 </script>
 

web-src/src/pages/PageAudiobooksArtists.vue

@@ -79,9 +79,7 @@ export default {
       this.artists_list.group(byName('name_sort', true))
       return this.artists_list
     }
-  },
-
-  methods: {}
+  }
 }
 </script>
 

web-src/src/pages/PageComposers.vue

@@ -64,9 +64,7 @@ export default {
     return {
       composers: new GroupByList()
     }
-  },
-
-  methods: {}
+  }
 }
 </script>
 

web-src/src/pages/PageGenres.vue

@@ -65,11 +65,7 @@ export default {
     return {
       genres: new GroupByList()
     }
-  },
-
-  computed: {},
-
-  methods: {}
+  }
 }
 </script>