Why DROP FUNCTION in CDB_EqualIntervalBins.sql?

[mhkeller]

Hi, I'm curious why the last line in the SQL file for the CDB_EqualIntervalBins includes a DROP FUNCTION line? It seems to drop the function that was just created:

cartodb-postgresql/scripts-available/CDB_EqualIntervalBins.sql

Line 24 in 667ec0e

DROP FUNCTION IF EXISTS @extschema@.CDB_EqualIntervalBins( numeric[], integer);