Get rid of unused bitsery FUID extension

This would need a UID conversion to be safe anyway, so it's better to
just get rid of it.

src/common/serialization/vst3/plugin-factory.h

@@ -20,7 +20,6 @@
 #include <bitsery/traits/string.h>
 #include <pluginterfaces/base/ipluginbase.h>
 
-#include "../../bitsery/ext/vst3.h"
 #include "base.h"
 #include "host-context-proxy.h"
 

src/common/serialization/vst3/plugin/component.h

@@ -19,7 +19,6 @@
 #include <bitsery/ext/std_optional.h>
 #include <pluginterfaces/vst/ivstcomponent.h>
 
-#include "../../../bitsery/ext/vst3.h"
 #include "../../common.h"
 #include "../base.h"