remove os and io in init

appveyor.yml

@@ -17,9 +17,8 @@ install:
   - bash -c "curl --retry 5 --connect-timeout 30 --location --remote-header-name --remote-name https://www.lua.org/ftp/lua-5.3.5.tar.gz ; exit 0"
   - tar xf lua-5.3.5.tar.gz
   - move lua-5.3.5\src lua
-  - sed -i '/{"execute",   os_execute},/d' lua/loslib.c
-  - sed -i '/", io_/d' lua/liolib.c
-  - sed -i '/", f_/d' lua/liolib.c
+  - sed -i '/LUA_IOLIBNAME/d' lua/linit.c
+  - sed -i '/LUA_OSLIBNAME/d' lua/linit.c
   
   - bash -c "curl --retry 5 --connect-timeout 30 --location --remote-header-name --remote-name https://www.sqlite.org/2018/sqlite-amalgamation-3240000.zip ; exit 0"
   - 7z x -y sqlite-amalgamation-3240000.zip