Upgrading from 9.6 to 12 and running into cast issues with pg_catalog.text()

I have some implicit casts such as real to text where they depend on the function pg_catalog.text(real) which seems to no longer exist in 12. The pg_upgrade failure says:

Command was: CREATE CAST (real AS "text") WITH FUNCTION "pg_catalog"."text"(real) AS IMPLICIT;

Should I just DROP CAST (real as text) or is there a better solution?

--