Clean up logic to show this action only runs once per call

Since a flow could be perceived as a continuous action, the take(1) function communicates this only runs once on the first set of results, then cancels itself.

app/src/main/java/io/xxlabs/messenger/requests/data/contact/ContactRequestRepository.kt

@@ -121,13 +121,12 @@ class ContactRequestsRepository @Inject constructor(
 
     override fun failUnverifiedRequests() {
         scope.launch {
-            getRequests().cancellable().collect { requests ->
+            getRequests().take(1).collect { requests ->
                 requests.filter {
                     it.requestStatus == VERIFYING
                 }.forEach {
                     update(it, VERIFICATION_FAIL)
                 }
-                this.coroutineContext.job.cancel()
             }
         }
     }