docs: remove SD_MESSAGE_CONFIG_ERROR from list

This list should be auto-generated... Let's remove the
ID that was removed from systemd from here too for now.

Author: keszybz

docs/id128.rst

@@ -36,5 +36,4 @@
    .. autoattribute:: systemd.id128.SD_MESSAGE_UNIT_STARTING
    .. autoattribute:: systemd.id128.SD_MESSAGE_UNIT_STOPPED
    .. autoattribute:: systemd.id128.SD_MESSAGE_UNIT_STOPPING
-   .. autoattribute:: systemd.id128.SD_MESSAGE_CONFIG_ERROR
    .. autoattribute:: systemd.id128.SD_MESSAGE_BOOTCHART