Remove scheduled_notifications

All code has been removed for ScheduledNotifications. This PR just
removes the table, it has never been used.

migrations/versions/0358_remove_sched_notifications_.py

@@ -0,0 +1,32 @@
+"""
+
+Revision ID: 0358_remove_sched_notifications
+Revises: 0357_validate_constraint
+Create Date: 2021-06-07 09:09:06.376862
+
+"""
+import sqlalchemy as sa
+from alembic import op
+from sqlalchemy.dialects import postgresql
+
+revision = '0358_remove_sched_notifications'
+down_revision = '0357_validate_constraint'
+
+
+def upgrade():
+    op.drop_index('ix_scheduled_notifications_notification_id', table_name='scheduled_notifications')
+    op.drop_table('scheduled_notifications')
+
+
+def downgrade():
+    op.create_table('scheduled_notifications',
+                    sa.Column('id', postgresql.UUID(), autoincrement=False, nullable=False),
+                    sa.Column('notification_id', postgresql.UUID(), autoincrement=False, nullable=False),
+                    sa.Column('scheduled_for', postgresql.TIMESTAMP(), autoincrement=False, nullable=False),
+                    sa.Column('pending', sa.BOOLEAN(), autoincrement=False, nullable=False),
+                    sa.ForeignKeyConstraint(['notification_id'], ['notifications.id'],
+                                            name='scheduled_notifications_notification_id_fkey'),
+                    sa.PrimaryKeyConstraint('id', name='scheduled_notifications_pkey')
+                    )
+    op.create_index('ix_scheduled_notifications_notification_id', 'scheduled_notifications', ['notification_id'],
+                    unique=False)