diff --git a/.golangci.yml b/.golangci.yml
index 9fd33f8..6a00fd0 100644
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -224,7 +224,7 @@ linters:
     # - govet
     # - errcheck
     # - staticcheck
-    # - unused
+    - unused
     # - gosimple
     # - ineffassign
     - typecheck
diff --git a/producer/smpolicy.go b/producer/smpolicy.go
index 9cea685..34a0f67 100644
--- a/producer/smpolicy.go
+++ b/producer/smpolicy.go
@@ -25,8 +25,6 @@ import (
 	"github.com/omec-project/pcf/util"
 )
 
-const flowRuleDataColl = "policyData.ues.flowRule"
-
 // SmPoliciesPost -
 func HandleCreateSmPolicyRequest(request *http_wrapper.Request) *http_wrapper.Response {
 	// step 1: log
diff --git a/service/init.go b/service/init.go
index 066c8ac..5af7847 100644
--- a/service/init.go
+++ b/service/init.go
@@ -53,8 +53,7 @@ type PCF struct{}
 type (
 	// Config information.
 	Config struct {
-		pcfcfg         string
-		heartBeatTimer string
+		pcfcfg string
 	}
 )