Remove some TODOs

app/src/main/java/com/hippo/ehviewer/download/DownloadService.java

@@ -48,7 +48,6 @@ import com.hippo.yorozuya.sparse.SparseJLArray;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 
-// TODO Stop and delete action should not pass through DownloadService
 public class DownloadService extends Service implements DownloadManager.DownloadListener {
 
     public static final String ACTION_START = "start";

app/src/main/java/com/hippo/ehviewer/spider/SpiderQueen.java

@@ -83,7 +83,6 @@ import okhttp3.Request;
 import okhttp3.Response;
 import okhttp3.ResponseBody;
 
-// TODO mWorkerPoolExecutor looks like a useless stuff, just use thread, wait when no request, interrupt when close
 public class SpiderQueen implements Runnable {
 
     private static final String TAG = SpiderQueen.class.getSimpleName();