Eliminate deprecated switches

[Ghazal-Mohammadpour]

Describe the bug
Within the regtests, certain switches are not utilized. Now, it is necessary to eliminate these deprecated switches from the regtests.

• F90 DUM: https://github.com/NOAA-EMC/WW3/issues/354
  

• BT2 : https://github.com/NOAA-EMC/WW3/issues/573 
  

• C90, NEC, SX6, SX8: https://github.com/NOAA-EMC/WW3/issues/357
  

• XX0, XXX: https://github.com/NOAA-EMC/WW3/issues/356
  

• FLXX, PRX, STX, NLX, BTX, DBX, TRX, BSX: https://github.com/NOAA-EMC/WW3/issues/355 
  

• NCC: https://github.com/NOAA-EMC/WW3/issues/353
  

• NCEP1: https://github.com/NOAA-EMC/WW3/issues/352
  

• NC4: https://github.com/NOAA-EMC/WW3/issues/359 
  

To Reproduce
N/A

Expected behavior
Our expectation is that there should be no deprecated switches visible.

Screenshots
N/A

Additional context
N/A

[ukmo-ccbunney]

HI @Ghazal-Mohammadpour
Thanks for raising this issue.
Could you provide some more details in the relevant sections of the issue template please?