Update GFS_layer/GFS_radiation_driver.F90 per Spencer Clark's suggest…

…ion on PR 58 review.

Co-authored-by: Spencer Clark <spencerkclark@gmail.com>

GFS_layer/GFS_radiation_driver.F90

@@ -1387,9 +1387,7 @@ subroutine GFS_radiation_driver                       &
       ! air and moles of co2 per square meter following the method in
       ! radlw_main.f.  These can be used later to compute a global mean carbon
       ! dioxide volume mixing ratio diagnostic if requested.
-      if (Model%ldiag3d) then
-        call compute_column_integrated_moles_of_dry_air_and_co2(Statein, gasvmr, IM, LMK, NF_VGAS, Diag)
-      endif
+      call compute_column_integrated_moles_of_dry_air_and_co2(Statein, gasvmr, IM, LMK, NF_VGAS, Diag)
 
       if (Model%do_diagnostic_radiation_with_scaled_co2) then
          do n = 1, Model%n_diagnostic_radiation_calls