Simplify make() (gosimple)

This fixes:
pkg/api/http_server.go:142:89: should use make(map[string]func(*http.Server, *tls.Conn, http.Handler)) instead (S1019)
pkg/services/alerting/scheduler.go:18:30: should use make(map[int64]*Job) instead (S1019)
pkg/services/alerting/scheduler.go:26:31: should use make(map[int64]*Job) instead (S1019)

pkg/api/http_server.go

@@ -139,7 +139,7 @@ func (hs *HTTPServer) listenAndServeTLS(certfile, keyfile string) error {
 	}
 
 	hs.httpSrv.TLSConfig = tlsCfg
-	hs.httpSrv.TLSNextProto = make(map[string]func(*http.Server, *tls.Conn, http.Handler), 0)
+	hs.httpSrv.TLSNextProto = make(map[string]func(*http.Server, *tls.Conn, http.Handler))
 
 	return hs.httpSrv.ListenAndServeTLS(setting.CertFile, setting.KeyFile)
 }

pkg/services/alerting/scheduler.go

@@ -15,7 +15,7 @@ type SchedulerImpl struct {
 
 func NewScheduler() Scheduler {
 	return &SchedulerImpl{
-		jobs: make(map[int64]*Job, 0),
+		jobs: make(map[int64]*Job),
 		log:  log.New("alerting.scheduler"),
 	}
 }
@@ -23,7 +23,7 @@ func NewScheduler() Scheduler {
 func (s *SchedulerImpl) Update(rules []*Rule) {
 	s.log.Debug("Scheduling update", "ruleCount", len(rules))
 
-	jobs := make(map[int64]*Job, 0)
+	jobs := make(map[int64]*Job)
 
 	for i, rule := range rules {
 		var job *Job