Remove unused variables cnvcld and pre_rad from GFS_control_type

[matusmartini]

Variables cnvcld and pre_rad are no longer used and can be removed from GFS_control_type along with their use.

https://github.com/NOAA-EMC/ufsatm/blob/develop/ccpp/data/GFS_typedefs.F90#L1239
https://github.com/NOAA-EMC/ufsatm/blob/develop/ccpp/data/GFS_typedefs.F90#L1658

They are not included in https://github.com/NOAA-EMC/ufsatm/blob/develop/ccpp/data/GFS_typedefs.meta