removes unused session code

pkg/middleware/recovery_test.go

@@ -6,7 +6,6 @@ import (
 
 	"github.com/grafana/grafana/pkg/bus"
 	m "github.com/grafana/grafana/pkg/models"
-	"github.com/grafana/grafana/pkg/services/session"
 	"github.com/grafana/grafana/pkg/setting"
 	. "github.com/smartystreets/goconvey/convey"
 	macaron "gopkg.in/macaron.v1"
@@ -66,7 +65,6 @@ func recoveryScenario(desc string, url string, fn scenarioFunc) {
 		sc.userAuthTokenService = newFakeUserAuthTokenService()
 		sc.m.Use(GetContextHandler(sc.userAuthTokenService))
 		// mock out gc goroutine
-		session.StartSessionGC = func() {}
 		sc.m.Use(OrgRedirect())
 		sc.m.Use(AddDefaultResponseHeaders())
 

pkg/services/session/session.go

@@ -19,7 +19,7 @@ const (
 
 var sessionManager *ms.Manager
 var sessionOptions *ms.Options
-var StartSessionGC func()
+var StartSessionGC func() = func() {}
 var GetSessionCount func() int
 var sessionLogger = log.New("session")
 var sessionConnMaxLifetime int64