luaPackages: rename std._debug to std__debug

Similarly rename std.normalize to std_normalize.
Having a dot in the name prevents some changes to the lua infrastructure,
for instance passing attribute names { std._debug }: to a function would fail with
`syntax error, unexpected ',', expecting '.' or '=',`

pkgs/top-level/lua-packages.nix

@@ -383,7 +383,7 @@ with self; {
       sha256 = "0p5583vidsm7s97zihf47c34vscwgbl86axrnj44j328v45kxb2z";
     };
 
-    propagatedBuildInputs = [ std.normalize bit32 ];
+    propagatedBuildInputs = [ std_normalize bit32 ];
 
     buildPhase = ''
       ${lua}/bin/lua build-aux/luke \
@@ -779,64 +779,6 @@ with self; {
     };
   };
 
-  std._debug = buildLuaPackage rec {
-    name = "std._debug-${version}";
-    version = "1.0";
-
-    src = fetchFromGitHub {
-      owner = "lua-stdlib";
-      repo = "_debug";
-      rev = "v${version}";
-      sha256 = "01kfs6k9j9zy4bvk13jx18ssfsmhlciyrni1x32qmxxf4wxyi65n";
-    };
-
-    # No Makefile.
-    dontBuild = true;
-
-    installPhase = ''
-      mkdir -p $out/share/lua/${lua.luaversion}/std
-      cp -r lib/std/_debug $out/share/lua/${lua.luaversion}/std/
-    '';
-
-    meta = with stdenv.lib; {
-      description = "Manage an overall debug state, and associated hint substates.";
-      homepage    = https://lua-stdlib.github.io/_debug;
-      license     = licenses.mit;
-      maintainers = with maintainers; [ lblasc ];
-      platforms   = platforms.unix;
-    };
-  };
-
-  std.normalize = buildLuaPackage rec {
-    name = "std.normalize-${version}";
-    version = "2.0.1";
-
-    src = fetchFromGitHub {
-      owner = "lua-stdlib";
-      repo = "normalize";
-      rev = "v${version}";
-      sha256 = "1yz96r28d2wcgky6by92a21755bf4wzpn65rdv2ps0fxywgw5rda";
-    };
-
-    propagatedBuildInputs = [ std._debug ];
-
-    # No Makefile.
-    dontBuild = true;
-
-    installPhase = ''
-      mkdir -p $out/share/lua/${lua.luaversion}/std
-      cp -r lib/std/normalize $out/share/lua/${lua.luaversion}/std/
-    '';
-
-    meta = with stdenv.lib; {
-      description = "Normalized Lua Functions";
-      homepage    = https://lua-stdlib.github.io/normalize;
-      license     = licenses.mit;
-      maintainers = with maintainers; [ lblasc ];
-      platforms   = platforms.unix;
-    };
-  };
-
   vicious = toLuaModule(stdenv.mkDerivation rec {
     name = "vicious-${version}";
     version = "2.3.1";