Reduce includes

ext/libstrawberry-tagreader/tagreader.h

@@ -25,7 +25,6 @@
 
 #include <QByteArray>
 #include <QString>
-#include <QTextCodec>
 
 #include <taglib/xiphcomment.h>
 #include <taglib/apetag.h>
@@ -33,6 +32,8 @@
 
 #include "tagreadermessages.pb.h"
 
+class QTextCodec;
+
 #ifndef USE_SYSTEM_TAGLIB
 namespace Strawberry_TagLib {
 #endif