Revert "[test] rule providers"

This reverts commit 078389f4f6.

constant/provider/interface.go

@@ -1,9 +1,6 @@
 package provider
 
-import "C"
 import (
-	"errors"
-	"github.com/Dreamacro/clash/component/trie"
 	"github.com/Dreamacro/clash/constant"
 )
 
@@ -106,26 +103,3 @@ type RuleProvider interface {
 	ShouldResolveIP() bool
 	AsRule(adaptor string) constant.Rule
 }
-
-var (
-	parse = func(ruleType, rule string, params []string) (C.Rule, error) {
-		return nil, errors.New("unimplemented function")
-	}
-
-	ruleProviders = map[string]*RuleProvider{}
-)
-
-func RuleProviders() map[string]*RuleProvider {
-	return ruleProviders
-}
-
-type ruleSetProvider struct {
-	count          int
-	DomainRules    *trie.DomainTrie
-	IPCIDRRules    *trie.IpCidrTrie
-	ClassicalRules []C.Rule
-}
-
-type RuleSetProvider struct {
-	*ruleSetProvider
-}