Remove update effective location database functions

Overview:
The following issue is observed in bugfest-iris.folio.ebsco.com environment.

Functions update_effective_location_on_holding_update () and update_effective_location_on_item_update () are both present in bugfest iris db

Bugfest-iris was updated from mod-inventory-storage-19.4.4 to mod-inventory-storage-20.2.1

We compared db schema to a cleanly installed Iris environment db schema (environment was not upgraded)

These functions do not exist in the cleanly installed environment

Migration scripts should be put in place for cleanup of no longer needed functions.

looks like triggers were removed but trigger functions still remain
https://github.com/folio-org/mod-inventory-storage/blob/v20.2.1/src/main/resources/templates/db_scripts/dropLegacyItemEffectiveLocationTriggers.sql

Expected Results:
Functions update_effective_location_on_holding_update () and update_effective_location_on_item_update () are removed as part of module upgrade
Actual Results:
Functions are present in upgraded environment
Additional Information:
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