Update staticcheck version and fix all warnings (#1381)

pkg/mqtrigger/messageQueue/kafka.go

@@ -69,7 +69,7 @@ func makeKafkaMessageQueue(logger *zap.Logger, routerUrl string, mqCfg MessageQu
 		version:   kafkaVersion,
 	}
 
-	if tls, _ := strconv.ParseBool(os.Getenv("TLS_ENABLED")); tls == true {
+	if tls, _ := strconv.ParseBool(os.Getenv("TLS_ENABLED")); tls {
 		kafka.tls = true
 
 		authKeys := make(map[string][]byte)

pkg/mqtrigger/messageQueue/messageQueue.go

@@ -55,7 +55,6 @@ type (
 	MessageQueueTriggerManager struct {
 		logger        *zap.Logger
 		reqChan       chan request
-		mqCfg         MessageQueueConfig
 		triggers      map[string]*triggerSubscription
 		fissionClient *crd.FissionClient
 		messageQueue  MessageQueue