Merge pull request #778 from tomdee/remove-wait

Remove wait() from backendmanager. Nothing calls it

backend/manager.go

@@ -28,7 +28,6 @@ var constructors = make(map[string]BackendCtor)
 
 type Manager interface {
 	GetBackend(backendType string) (Backend, error)
-	Wait()
 }
 
 type manager struct {
@@ -90,10 +89,6 @@ func (bm *manager) GetBackend(backendType string) (Backend, error) {
 	return be, nil
 }
 
-func (bm *manager) Wait() {
-	bm.wg.Wait()
-}
-
 func Register(name string, ctor BackendCtor) {
 	constructors[name] = ctor
 }