plugins/python: fix confusing version display

IO/Group/Policy Python API version is displayed instead of sudo version,
because that is not very meaningful in this context.

They are only displayed in verbose mode.

Example plugins express it more concrete that they are displaying their
version, not the API version.

plugins/python/python_plugin_common.c

@@ -401,7 +401,6 @@ python_plugin_show_version(struct PluginContext *plugin_ctx, const char *python_
 {
     debug_decl(python_plugin_show_version, PYTHON_DEBUG_CALLBACKS);
 
-    py_sudo_log(SUDO_CONV_INFO_MSG, "Python language plugin version %s\n", PACKAGE_VERSION);
     debug_return_int(python_plugin_api_rc_call(plugin_ctx, python_callback_name,
                                                Py_BuildValue("(i)", is_verbose)));
 }