diff --git a/common/httpx/copyright.go b/common/httpx/copyright.go
index 27c386dcd..f647c3f79 100644
--- a/common/httpx/copyright.go
+++ b/common/httpx/copyright.go
@@ -6,20 +6,8 @@ import (
 	"strings"
 )
 
-var (
-	crcutset           = "\n\t\v\f\r,"
-	crreYear = regexp.MustCompile(`(?:copyright|Copyright|COPYRIGHT|\(C\)|\(c\)|©|&copy;|&#169;)?\s*(?:[a-zA-Z0-9 ,-]+\s*)?[\s,]*(199[0-9]|20[0-1][0-9]|202[0-4])[\s,<-]+(?:copyright|Copyright|COPYRIGHT|\(C\)|\(c\)|©|&copy;|&#169;|199[0-9]|20[0-1][0-9]|202[0-4])?`)
-
-	supportedYearMimeTypes = []string{
-		"text/html",
-		"application/xhtml+xml",
-		"application/xml",
-		"application/rss+xml",
-		"application/atom+xml",
-		"application/xhtml+xml",
-		"application/vnd.wap.xhtml+xml",
-	}
-)
+var crreYear = regexp.MustCompile(`(?:copyright|Copyright|COPYRIGHT|\(C\)|\(c\)|©|&copy;|&#169;)?\s*(?:[a-zA-Z0-9 ,-]+\s*)?[\s,]*(199[0-9]|20[0-1][0-9]|202[0-4])[\s,<-]+(?:copyright|Copyright|COPYRIGHT|\(C\)|\(c\)|©|&copy;|&#169;|199[0-9]|20[0-1][0-9]|202[0-4])?`)
+
 
 func cleanText(text string) string {
     text = strings.ReplaceAll(text, "<span>", "")