schedules: remove timedelta options

rhodecode/model/db.py

@@ -5292,9 +5292,8 b' class ScheduleEntry(Base, BaseModel):'
     )
     SCHEDULE_TYPE_INTEGER = "integer"
     SCHEDULE_TYPE_CRONTAB = "crontab"
-    SCHEDULE_TYPE_TIMEDELTA = "timedelta"
-
-    schedule_types = [SCHEDULE_TYPE_CRONTAB, SCHEDULE_TYPE_TIMEDELTA, SCHEDULE_TYPE_INTEGER]
+
+    schedule_types = [SCHEDULE_TYPE_CRONTAB, SCHEDULE_TYPE_INTEGER]
     schedule_entry_id = Column('schedule_entry_id', Integer(), primary_key=True)
 
     schedule_name = Column("schedule_name", String(255), nullable=False, unique=None, default=None)