clean(resolvers): remove redundant validation

Author: e11sy

src/resolvers/projectNotifications.ts

@@ -76,19 +76,6 @@ interface ProjectNotificationsRulePointer {
   ruleId: string;
 }
 
-/**
- * Return true if all passed channels are empty
- * @param channels - project notifications channels
- */
-function isChannelsEmpty(channels: NotificationsChannelsDBScheme): boolean {
-  const notEmptyChannels = Object.entries(channels)
-    .filter(([_, channel]) => {
-      return (channel as NotificationsChannelSettingsDBScheme).endpoint.replace(/\s+/, '').trim().length !== 0;
-    });
-
-  return notEmptyChannels.length === 0;
-}
-
 /**
  * Returns true is threshold and threshold period are valid
  * @param threshold - threshold of the notification rule to be checked