Tidy & fix deprecation warning

Author: MetRonnie

cylc/flow/tui/util.py

@@ -384,19 +384,6 @@ def get_task_status_summary(flow):
     ]
 
 
-def get_workflow_status_str(flow):
-    """Return a workflow status string for the header.
-
-    Arguments:
-        flow (dict):
-            GraphQL JSON response for this workflow.
-
-    Returns:
-        list - Text list for the urwid.Text widget.
-
-    """
-
-
 def _render_user(node, data):
     return f'~{ME}'
 

cylc/flow/wallclock.py

@@ -16,7 +16,7 @@
 """Wall clock related utilities."""
 
 from calendar import timegm
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta, timezone
 
 from metomi.isodatetime.timezone import (
     get_local_time_zone_format, get_local_time_zone, TimeZoneFormatMode)
@@ -209,7 +209,7 @@ def get_time_string_from_unix_time(unix_time, display_sub_seconds=False,
     to use as the time zone designator.
 
     """
-    date_time = datetime.utcfromtimestamp(unix_time)
+    date_time = datetime.fromtimestamp(unix_time, timezone.utc)
     return get_time_string(date_time,
                            display_sub_seconds=display_sub_seconds,
                            use_basic_format=use_basic_format,