Suspend DownloadLabelDao delete

app/src/main/java/com/hippo/ehviewer/EhDB.kt

@@ -141,10 +141,9 @@ object EhDB {
         dao.update(list)
     }
 
-    @Synchronized
-    fun removeDownloadLabel(raw: DownloadLabel?) {
+    suspend fun removeDownloadLabel(raw: DownloadLabel) {
         val dao = db.downloadLabelDao()
-        dao.delete(raw!!)
+        dao.delete(raw)
     }
 
     suspend fun removeLocalFavorites(gid: Long) {

app/src/main/java/com/hippo/ehviewer/dao/DownloadLabelDao.kt

@@ -24,5 +24,5 @@ interface DownloadLabelDao {
     fun insert(t: DownloadLabel): Long
 
     @Delete
-    fun delete(downloadLabel: DownloadLabel)
+    suspend fun delete(downloadLabel: DownloadLabel)
 }

app/src/main/java/com/hippo/ehviewer/download/DownloadManager.kt

@@ -769,7 +769,7 @@ object DownloadManager : OnSpiderListener {
         }
     }
 
-    fun deleteLabel(label: String) {
+    suspend fun deleteLabel(label: String) {
         // Find in label list and remove
         var found = false
         val iterator = labelList.iterator()