Updated _Sidebar (markdown)

_Sidebar.md

@@ -13,7 +13,6 @@
 * [raylib default shader](raylib-default-shader)
 * [raylib custom shaders](raylib-generic-uber-shader-and-custom-shaders)
 * [raylib coding conventions](raylib-coding-conventions)
-* [raylib memory pools](raylib-memory-pool)
 * [raylib integration with other libs](raylib-integration-with-other-libraries)
 
 ## Development Platforms