Revert "Add LuaJIT CMake for Android build"

This reverts commit 205b5d892961b34a22008da2f345f70e270241eb.

libs/LuaJIT/CMakeLists.txt

@@ -1,13 +0,0 @@
-cmake_minimum_required(VERSION 3.6)
-
-project(LuaJIT LANGUAGES C)
-
-if(ANDROID)
-	add_library(luajit STATIC IMPORTED GLOBAL)
-	set_target_properties(luajit PROPERTIES
-		IMPORTED_LOCATION android/${ANDROID_ABI}/libluajit.a
-		INCLUDE_DIRECTORIES src
-	)
-else()
-	message(WARNING "This script is only for Android")
-endif()