remove unnecessary instance check

pkg/costmodel/allocation.go

@@ -21,11 +21,11 @@ const (
 	queryFmtPods              = `avg(kube_pod_container_status_running{}) by (pod, namespace, %s)[%s:%s]%s`
 	queryFmtRAMBytesAllocated = `avg(avg_over_time(container_memory_allocation_bytes{container!="", container!="POD", node!=""}[%s]%s)) by (container, pod, namespace, node, %s, provider_id)`
 	queryFmtRAMRequests       = `avg(avg_over_time(kube_pod_container_resource_requests{resource="memory", unit="byte", container!="", container!="POD", node!=""}[%s]%s)) by (container, pod, namespace, node, %s)`
-	queryFmtRAMUsageAvg       = `avg(avg_over_time(container_memory_working_set_bytes{container!="", container_name!="POD", container!="POD", instance!=""}[%s]%s)) by (container_name, container, pod_name, pod, namespace, instance, %s)`
-	queryFmtRAMUsageMax       = `max(max_over_time(container_memory_working_set_bytes{container!="", container_name!="POD", container!="POD", instance!=""}[%s]%s)) by (container_name, container, pod_name, pod, namespace, instance, %s)`
+	queryFmtRAMUsageAvg       = `avg(avg_over_time(container_memory_working_set_bytes{container!="", container_name!="POD", container!="POD"}[%s]%s)) by (container_name, container, pod_name, pod, namespace, instance, %s)`
+	queryFmtRAMUsageMax       = `max(max_over_time(container_memory_working_set_bytes{container!="", container_name!="POD", container!="POD"}[%s]%s)) by (container_name, container, pod_name, pod, namespace, instance, %s)`
 	queryFmtCPUCoresAllocated = `avg(avg_over_time(container_cpu_allocation{container!="", container!="POD", node!=""}[%s]%s)) by (container, pod, namespace, node, %s)`
 	queryFmtCPURequests       = `avg(avg_over_time(kube_pod_container_resource_requests{resource="cpu", unit="core", container!="", container!="POD", node!=""}[%s]%s)) by (container, pod, namespace, node, %s)`
-	queryFmtCPUUsageAvg       = `avg(rate(container_cpu_usage_seconds_total{container!="", container_name!="POD", container!="POD", instance!=""}[%s]%s)) by (container_name, container, pod_name, pod, namespace, instance, %s)`
+	queryFmtCPUUsageAvg       = `avg(rate(container_cpu_usage_seconds_total{container!="", container_name!="POD", container!="POD"}[%s]%s)) by (container_name, container, pod_name, pod, namespace, instance, %s)`
 
 	// This query could be written without the recording rule
 	// "kubecost_savings_container_cpu_usage_seconds", but we should