Revert "Project modernization (#630)"

This code was not tested and breaks in Release builds, reverting to restore
functionality of the nightly. All in-game menus do not work and generating
a world crashes.

This reverts commit a9be52c41a.

Minecraft.Client/Common/DLC/DLCUIDataFile.h

@@ -10,11 +10,11 @@ private:
 
 public:
 	DLCUIDataFile(const wstring &path);
-	~DLCUIDataFile() override;
+	~DLCUIDataFile();
 
 	using DLCFile::addData;
 	using DLCFile::addParameter;
 
 	virtual void addData(PBYTE pbData, DWORD dwBytes,bool canDeleteData = false);
-    PBYTE getData(DWORD &dwBytes) override;
+	virtual PBYTE getData(DWORD &dwBytes);
 };