TTS helper should not be shutdown

app/src/main/java/eu/faircode/email/ServiceSynchronize.java

@@ -1096,8 +1096,6 @@ public class ServiceSynchronize extends ServiceBase implements SharedPreferences
 
         liveAccountNetworkState.postDestroy();
 
-        TTSHelper.shutdown();
-
         try {
             stopForeground(true);
         } catch (Throwable ex) {

app/src/main/java/eu/faircode/email/TTSHelper.java

@@ -90,18 +90,4 @@ public class TTSHelper {
                 speak.run();
         }
     }
-
-    static void shutdown() {
-        synchronized (lock) {
-            if (instance != null)
-                try {
-                    Log.i("TTS shutdown");
-                    instance.shutdown();
-                    instance = null;
-                } catch (Throwable ex) {
-                    Log.e(ex);
-                }
-            status = null;
-        }
-    }
 }