Revert "fix: returning error if outbound by any reason is different then expected"

This reverts commit 93c63d5.

Author: WendelHime

protocol/group/selector.go

@@ -2,7 +2,6 @@ package group
 
 import (
 	"context"
-	"fmt"
 	"net"
 
 	"github.com/sagernet/sing-box/adapter"
@@ -33,14 +32,8 @@ func NewSelector(ctx context.Context, router adapter.Router, logger log.ContextL
 	if err != nil {
 		return nil, err
 	}
-	switch o := outbound.(type) {
-	case *group.Selector:
-		return &Selector{o}, nil
-	case *Selector:
-		return o, nil
-	default:
-		return nil, fmt.Errorf("unexpected outbound type: %T", outbound)
-	}
+
+	return &Selector{outbound.(*group.Selector)}, nil
 }
 
 func (s *Selector) DialContext(ctx context.Context, network string, destination metadata.Socksaddr) (net.Conn, error) {

protocol/group/urltest.go

@@ -2,7 +2,6 @@ package group
 
 import (
 	"context"
-	"fmt"
 	"net"
 
 	"github.com/sagernet/sing-box/adapter"
@@ -30,14 +29,7 @@ func NewURLTest(ctx context.Context, router adapter.Router, logger log.ContextLo
 	if err != nil {
 		return nil, err
 	}
-	switch o := outbound.(type) {
-	case *group.URLTest:
-		return &URLTest{o}, nil
-	case *URLTest:
-		return o, nil
-	default:
-		return nil, fmt.Errorf("unexpected outbound type: %T", outbound)
-	}
+	return &URLTest{outbound.(*group.URLTest)}, nil
 }
 
 func (s *URLTest) DialContext(ctx context.Context, network string, destination metadata.Socksaddr) (net.Conn, error) {