Remove etc/lmod-setup scripts

[gspetro-NOAA]

Description

With the move to Gaea C5 (and eventually C6), it appears that the lmod-setup scripts may no longer be needed.

Solution

Consider removing these scripts and updating documentation to reflect that these are no longer needed.

Requirements**

TBD, but probably removing the scripts and updating docs will be sufficient.

Acceptance Criteria (Definition of Done)

SRW App runs without issue on all supported platforms w/o lmod-setup script.