file_sys: Cut down on includes and copies

src/core/file_sys/registered_cache.cpp

@@ -254,6 +254,8 @@ RegisteredCache::RegisteredCache(VirtualDir dir_, RegisteredCacheParsingFunction
     Refresh();
 }
 
+RegisteredCache::~RegisteredCache() = default;
+
 bool RegisteredCache::HasEntry(u64 title_id, ContentRecordType type) const {
     return GetEntryRaw(title_id, type) != nullptr;
 }

src/core/file_sys/registered_cache.h

@@ -63,6 +63,7 @@ public:
     explicit RegisteredCache(VirtualDir dir,
                              RegisteredCacheParsingFunction parsing_function =
                                  [](const VirtualFile& file, const NcaID& id) { return file; });
+    ~RegisteredCache();
 
     void Refresh();
 

src/core/file_sys/sdmc_factory.h

@@ -4,11 +4,14 @@
 
 #pragma once
 
+#include <memory>
 #include "core/file_sys/vfs.h"
 #include "core/hle/result.h"
 
 namespace FileSys {
 
+class RegisteredCache;
+
 /// File system interface to the SDCard archive
 class SDMCFactory {
 public: