Revert "Add the nCine addon (#190)"

This reverts commit 05b3eaf.

Author: carsakiller

.gitmodules

@@ -202,7 +202,3 @@
 [submodule "addons/scribunto/module"]
 	path = addons/scribunto/module
 	url = https://github.com/Dianliang233/scribunto-addon
-[submodule "addons/ncine/module"]
-	path = addons/ncine/module
-	url = https://github.com/nCine/nCine-LuaCATS.git
-	branch = addon