3rdparty: do not check for INCLUDE

3rdparty/luajit/src/msvcbuild.bat

@@ -11,8 +11,6 @@
 @rem
 @rem Then cd to this directory and run this script.
 
-@if not defined INCLUDE goto :FAIL
-
 @setlocal
 @set LJCOMPILE=cl /nologo /c /O2 /W3 /D_CRT_SECURE_NO_DEPRECATE /D_CRT_STDIO_INLINE=__declspec(dllexport)__inline
 @set LJLINK=link /nologo