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/DLCColourTableFile.h

@@ -10,9 +10,9 @@ private:
 
 public:
 	DLCColourTableFile(const wstring &path);
-	~DLCColourTableFile() override;
+	~DLCColourTableFile();
 
-    void addData(PBYTE pbData, DWORD dwBytes) override;
+	virtual void addData(PBYTE pbData, DWORD dwBytes);
 
-	ColourTable *getColourTable() const { return m_colourTable; }
+	ColourTable *getColourTable() { return m_colourTable; }
 };