Revert "Add alert when frontend can't communicate with backend (#7051)…

…" (#7093)

This reverts commit 6992798.

ops/services/alerts/app_service_metrics/main.tf

@@ -480,38 +480,3 @@ and duration >= 180000
     ]
   }
 }
-
-resource "azurerm_monitor_scheduled_query_rules_alert" "frontend_fail_to_communicate_with_backend_alert" {
-  name                = "${var.env}_frontend_fail_to_communicate_with_backend_alert"
-  description         = "Action will be triggered when API request to feature flag endpoint failures > 0"
-  location            = data.azurerm_resource_group.app.location
-  resource_group_name = var.rg_name
-  severity            = var.severity
-  frequency           = 20
-  time_window         = 20
-  enabled             = contains(var.disabled_alerts, "frontend_fail_to_communicate_with_backend_alert") ? false : true
-
-  data_source_id = var.app_insights_id
-
-  query = <<-QUERY
-dependencies
-| where type == "Fetch" and name has "api/feature-flags" and success == false and client_Type == "Browser"
-| summarize count() by bin(ago(20m), 5m)
-  QUERY
-
-  trigger {
-    operator  = "GreaterThan"
-    threshold = 0
-  }
-
-  action {
-    action_group           = var.action_group_ids
-    custom_webhook_payload = var.wiki_docs_text
-  }
-
-  lifecycle {
-    ignore_changes = [
-      tags
-    ]
-  }
-}