refactor and removing unused code

pkg/zabbixapi/models.go

@@ -1,8 +1,15 @@
 package zabbixapi
 
+import "encoding/json"
+
 type ZabbixAPIRequest struct {
 	Method string          `json:"method"`
 	Params ZabbixAPIParams `json:"params,omitempty"`
 }
 
+func (r *ZabbixAPIRequest) String() string {
+	jsonRequest, _ := json.Marshal(r.Params)
+	return r.Method + string(jsonRequest)
+}
+
 type ZabbixAPIParams = map[string]interface{}