[#306] Remove flag to disable policy contract

Signed-off-by: Denis Kirillov <d.kirillov@yadro.com>

api/handler/api.go

@@ -61,8 +61,6 @@ type (
 		GetBucketPolicy(ns string, cnrID cid.ID) ([]byte, error)
 		SaveACLChains(ns string, chains []*chain.Chain) error
 	}
-
-	frostfsIDDisabled struct{}
 )
 
 var _ api.Handler = (*handler)(nil)
@@ -76,10 +74,8 @@ func New(log *zap.Logger, obj layer.Client, notificator Notificator, cfg Config,
 		return nil, errors.New("empty logger")
 	case storage == nil:
 		return nil, errors.New("empty policy storage")
-	}
-
-	if ffsid == nil {
-		ffsid = frostfsIDDisabled{}
+	case ffsid == nil:
+		return nil, errors.New("empty frostfsid")
 	}
 
 	if !cfg.NotificatorEnabled() {
@@ -98,14 +94,6 @@ func New(log *zap.Logger, obj layer.Client, notificator Notificator, cfg Config,
 	}, nil
 }
 
-func (f frostfsIDDisabled) GetUserAddress(_, _ string) (string, error) {
-	return "", errors.New("frostfsid disabled")
-}
-
-func (f frostfsIDDisabled) GetUserKey(account, name string) (string, error) {
-	return "", errors.New("frostfsid disabled")
-}
-
 // pickCopiesNumbers chooses the return values following this logic:
 // 1) array of copies numbers sent in request's header has the highest priority.
 // 2) array of copies numbers with corresponding location constraint provided in the config file.