cleanup code

Author: wwqgtxx

core/src/main/golang/native/config/provider.go

@@ -25,10 +25,14 @@ func forEachProviders(rawCfg *config.RawConfig, fun func(index int, total int, k
 
 func destroyProviders(cfg *config.Config) {
 	for _, p := range cfg.Providers {
-		_ = p.(io.Closer).Close()
+		if p, ok := p.(io.Closer); ok {
+			_ = p.Close()
+		}
 	}
 
 	for _, p := range cfg.RuleProviders {
-		_ = p.(io.Closer).Close()
+		if p, ok := p.(io.Closer); ok {
+			_ = p.Close()
+		}
 	}
 }

core/src/main/golang/native/log_open.go renamed to core/src/main/golang/native/log.go

@@ -1,5 +1,3 @@
-//go:build !premium
-
 package main
 
 //#include "bridge.h"

core/src/main/golang/native/log_premium.go

@@ -1,5 +1,3 @@
-//go:build !premium
-
 package tun
 
 import (

core/src/main/golang/native/tun/metadata_open.go renamed to core/src/main/golang/native/tun/metadata.go

@@ -1,5 +1,3 @@
-//go:build !premium
-
 package tunnel
 
 import (

core/src/main/golang/native/tun/metadata_premium.go

@@ -1,5 +1,3 @@
-//go:build !premium
-
 package tunnel
 
 import (