code: def downgrade():
      # ### commands auto generated by Alembic - please adjust! ###
      op.drop_index(
          op.f("ix_slice_email_schedules_active"),
          table_name="slice_email_schedules",
      )
      op.drop_table("slice_email_schedules")
      op.drop_index(
          op.f("ix_dashboard_email_schedules_active"),
          table_name="dashboard_email_schedules",
      )
      op.drop_table("dashboard_email_schedules")
  
imports: import sqlalchemy
  from alembic import op
label_desc: Use image node_id 2 for calling a global function with example usage: downgrade() without return types