Revert "shared_ptr -> std::shared_ptr"

This reverts commit 7074f35e4b.

Minecraft.Client/PistonPieceRenderer.h

@@ -2,13 +2,13 @@
 class PistonPieceEntity;
 class TileRenderer;
 
-class PistonPieceRenderer : public TileEntityRenderer
+class PistonPieceRenderer : public TileEntityRenderer 
 {
 private:
 	TileRenderer *tileRenderer;
 
 public:
 	PistonPieceRenderer();
-    virtual void render(std::shared_ptr<TileEntity> _entity, double x, double y, double z, float a, bool setColor, float alpha=1.0f, bool useCompiled = true); // 4J added setColor param
+    virtual void render(shared_ptr<TileEntity> _entity, double x, double y, double z, float a, bool setColor, float alpha=1.0f, bool useCompiled = true); // 4J added setColor param
 	virtual void onNewLevel(Level *level);
 };