Remove the script to copy between geogrid and ertbox grid for petrophysical field parameters to other repository

[oddvarlia]

Purpose: The functionality to copy between ERTBOX and geogrid is used both in APS when users apply customized trends (3D RMS grid parameters) and in FMU workflows where petrophysical fields generated in the geomodel is copied (and extrapolated) to fill the ERTBOX grid used when updating field parameters in ERT. This functionality should be moved over to a repository which contains functions of more general type used in FMU workflows.