Revert "shared_ptr -> std::shared_ptr"

This reverts commit 7074f35e4b.

Minecraft.World/TileEntityDataPacket.h

@@ -31,6 +31,6 @@ public:
 	virtual int getEstimatedSize();
 
 public:
-	static std::shared_ptr<Packet> create() { return std::shared_ptr<Packet>(new TileEntityDataPacket()); }
+	static shared_ptr<Packet> create() { return shared_ptr<Packet>(new TileEntityDataPacket()); }
 	virtual int getId() { return 132; }
 };