[messages] remove unused code

Author: capcom6

app/src/main/java/me/capcom/smsgateway/modules/messages/MessagesService.kt

@@ -182,9 +182,9 @@ class MessagesService(
         dao.truncateLog(System.currentTimeMillis() - lifetime * 86400000L)
     }
 
-    internal suspend fun sendPendingMessages(): Boolean {
+    internal suspend fun sendPendingMessages() {
         while (true) {
-            val message = dao.getPending() ?: return false
+            val message = dao.getPending() ?: return
             delay(1L)
 
             // don't apply limits for expedited messages

app/src/main/java/me/capcom/smsgateway/modules/messages/workers/SendMessagesWorker.kt

@@ -25,9 +25,7 @@ class SendMessagesWorker(appContext: Context, params: WorkerParameters) :
 
     override suspend fun doWork(): Result {
         return try {
-            while (messagesSvc.sendPendingMessages()) {
-                // why not to `Result.retry()`?
-            }
+            messagesSvc.sendPendingMessages()
 
             Result.success()
         } catch (e: Exception) {