Remove abstract keyword for classes that are not subclassed

src/components/commandHandler.ts

@@ -22,7 +22,7 @@ import { PlaybackManager } from './playbackManager';
 import { DocumentManager } from './documentManager';
 
 // eslint-disable-next-line @typescript-eslint/no-extraneous-class
-export abstract class CommandHandler {
+export class CommandHandler {
     private static playerManager: framework.PlayerManager;
     private static supportedCommands: SupportedCommands = {
         DisplayContent: CommandHandler.displayContentHandler,

src/components/documentManager.ts

@@ -6,7 +6,7 @@ import { JellyfinApi } from './jellyfinApi';
 import { DeviceIds, getActiveDeviceId } from './castDevices';
 
 // eslint-disable-next-line @typescript-eslint/no-extraneous-class
-export abstract class DocumentManager {
+export class DocumentManager {
     // Duration between each backdrop switch in ms
     private static backdropPeriodMs = 30000;
     // Timer state - so that we don't start the interval more than necessary

src/components/jellyfinApi.ts

@@ -24,7 +24,7 @@ axios.interceptors.response.use(
 );
 
 // eslint-disable-next-line @typescript-eslint/no-extraneous-class
-export abstract class JellyfinApi {
+export class JellyfinApi {
     // Security token to prove authentication
     public static accessToken: string | undefined;
 

src/components/playbackManager.ts

@@ -52,7 +52,7 @@ export interface PlaybackState {
 }
 
 // eslint-disable-next-line @typescript-eslint/no-extraneous-class
-export abstract class PlaybackManager {
+export class PlaybackManager {
     private static playerManager: framework.PlayerManager;
     private static activePlaylist: BaseItemDto[];
     private static activePlaylistIndex: number;