Drop check for ancient dbus versions

This check warned against using a very old dbus version that caused
breakage. However, the check used the `distutils` package for version
comparison, but that package is deprecated and will be removed in an
upcoming python version. Since there does not seem to be a direct
alternative for version comparisons in the core Python libraries and
this check is about a 4-year old dbus version anyway, just remove the
check rather than adding an extra dependency just for this.

src/hamster/client.py

@@ -25,7 +25,6 @@
 import sys
 
 from calendar import timegm
-from distutils.version import LooseVersion
 from gi.repository import GObject as gobject
 from textwrap import dedent
 
@@ -42,16 +41,6 @@
 from hamster.lib import datetime as dt
 
 
-# bug fixed in dbus-python 1.2.14 (released on 2019-11-25)
-assert not (
-    sys.version_info >= (3, 8)
-    and LooseVersion(dbus.__version__) < LooseVersion("1.2.14")
-    ), """python3.8 changed str(<dbus integers>).
-       That broke hamster (https://github.com/projecthamster/hamster/issues/477).
-       Please upgrade to dbus-python >= 1.2.14.
-    """
-
-
 class Storage(gobject.GObject):
     """Hamster client class, communicating to hamster storage daemon via d-bus.
        Subscribe to the `tags-changed`, `facts-changed` and `activities-changed`