ibus-engines.table: remove hacky change to source code

Co-Authored-By: Jan Tojnar <jtojnar@gmail.com>

pkgs/tools/inputmethods/ibus-engines/ibus-table/default.nix

@@ -30,7 +30,14 @@ stdenv.mkDerivation rec {
   '';
 
   buildInputs = [
-    dconf gtk3 gobject-introspection ibus (python3.withPackages (pypkgs: with pypkgs; [ pygobject3 ]))
+    dconf
+    gtk3
+    gobject-introspection
+    ibus
+    (python3.withPackages (pypkgs: with pypkgs; [
+      pygobject3
+      (toPythonModule ibus)
+    ]))
   ];
 
   nativeBuildInputs = [
@@ -46,12 +53,6 @@ stdenv.mkDerivation rec {
       --replace "docbook2man" "docbook2man --sgml"
   '';
 
-  postFixup = ''
-    wrapPythonPrograms
-    sed -e 's/LookupTable/LookupTable.new/' \
-        -i "$out/share/ibus-table/engine/table.py"
-  '';
-
   meta = with stdenv.lib; {
     isIbusEngine = true;
     description  = "An IBus framework for table-based input methods";