Remove incorrect and misleading comments in config.base

[KateFriedman-NOAA]

Expected behavior

Comments should be correct and not misleading, particularly for new users.

Current behavior

A comment block in config.base.emc.dyn and config.base.nco.static currently mentions an OUTPUT_GRID we do not support (cubed_sphere_grid) and can mislead users to change OUTPUT_GRID away from the default of gaussian_grid, which causes forecast job failures (e.g. in APP=ATM forecast-only mode at least) when the incorrect diag_table is used.

Error in gfsfcst.log:

 21: FATAL from PE    21: diag_util_mod::init_output_field: file fv3_history2d is NOT found in the diag_table

When export OUTPUT_GRID=cubed_sphere_grid is set config.fcst sets a diag_table that doesn't work:

+++ config.fcst[319]: export DIAG_TABLE=/scratch1/NCEPDEV/global/Nick.Szapiro/global/global-workflow/parm/parm_fv3diag/diag_table_orig

Machines affected

All, machine agnostic.

To Reproduce

Set up an out-of-the-box forecast-only test and change OUTPUT_GRID to "cubed_sphere_grid".

Detailed Description

Remove the following comments in both config.base versions to remove the incorrect and misleading details:

# I/O QUILTING, true--use Write Component; false--use GFDL FMS
# if quilting=true, choose OUTPUT_GRID as cubed_sphere_grid in netcdf
# if gaussian_grid, set OUTPUT_FILE for netcdf