Revert "shared_ptr -> std::shared_ptr"

This reverts commit 7074f35e4b.

Minecraft.Client/CowRenderer.h

@@ -5,5 +5,5 @@ class CowRenderer : public MobRenderer
 {
 public:
 	CowRenderer(Model *model, float shadow);
-	virtual void render(std::shared_ptr<Entity> _mob, double x, double y, double z, float rot, float a);
+	virtual void render(shared_ptr<Entity> _mob, double x, double y, double z, float rot, float a);
 };