Do not expose plugin_slot.

PiperOrigin-RevId: 683215401
Change-Id: Ic64f7221ed83ca3b0c8cca16eb680ea67c67b564

python/mujoco/codegen/generate_spec_bindings.py

@@ -461,11 +461,6 @@ def generate_add() -> None:
                 } catch (const py::cast_error &e) {
                   throw pybind11::value_error("plugin.instance_name should be a string.");
                 }
-                try {
-                  plugin.plugin_slot = input->plugin_slot;
-                } catch (const py::cast_error &e) {
-                  throw pybind11::value_error("plugin.plugin_slot should be an int.");
-                }
                 try {
                   plugin.active = input->active;
                 } catch (const py::cast_error &e) {

python/mujoco/specs_test.py

@@ -207,13 +207,11 @@ class SpecsTest(absltest.TestCase):
     plugin = spec.add_plugin(
         name='instance_name',
         plugin_name='mujoco.plugin',
-        plugin_slot=7,
         active=True,
         info='info',
     )
     self.assertEqual(plugin.name, 'instance_name')
     self.assertEqual(plugin.plugin_name, 'mujoco.plugin')
-    self.assertEqual(plugin.plugin_slot, 7)
     self.assertEqual(plugin.active, True)
     self.assertEqual(plugin.info, 'info')
 
@@ -229,7 +227,6 @@ class SpecsTest(absltest.TestCase):
     body_with_plugin = spec.worldbody.add_body(plugin=plugin)
     self.assertEqual(body_with_plugin.plugin.name, 'instance_name')
     self.assertEqual(body_with_plugin.plugin.plugin_name, 'mujoco.plugin')
-    self.assertEqual(body_with_plugin.plugin.plugin_slot, 7)
     self.assertEqual(body_with_plugin.plugin.active, True)
     self.assertEqual(body_with_plugin.plugin.info, 'info')