Remove proprietary IBM routines

[AlexanderRichert-NOAA]

The following routines are copied and pasted from unlicensed proprietary code, specifically, IBM ESSL: dcrft scrft csfft drcft srcft scfft rfftf. These need to be removed or replaced with non-proprietary ones. Below is a list of where these routines are used.

• [ ] ip: src/spffte.f; src/spfft.f; src/spfft1.f Based on nm output:
• [ ] UFS_UTILS: chgres_cube; emcsfc_snow2mdl; orog (sorc/orog_mask_tools.fd/orog.fd/mtnlm7_oclsm.F contains direct calls)
• [ ] grib_util: copygb; copygb2
• [ ] upp: upp.x

[AlexanderRichert-NOAA]

Looks like these subroutines are swap-in replacements for the IBM routines, but not the IBM-written routines themselves. Closing.