Revert "shared_ptr -> std::shared_ptr"

This reverts commit 7074f35e4b.

Minecraft.Client/ChickenRenderer.h

@@ -5,7 +5,7 @@ class ChickenRenderer : public MobRenderer
 {
 public:
 	ChickenRenderer(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);
 protected:
-	virtual float getBob(std::shared_ptr<Mob> _mob, float a);
+	virtual float getBob(shared_ptr<Mob> _mob, float a);
 };