Remove enable_averages() in update_ocean_model()

I had added enable_averages() when I put some post_data() calls in a routine
called from convert_IOB_to_fluxes(), but I moved those calls to
forcing_diagnostics() so we are back to not calling post_data() from this part
of the code.

Author: mnlevy1981

config_src/drivers/nuopc_cap/mom_ocean_model_nuopc.F90

@@ -569,9 +569,6 @@ subroutine update_ocean_model(Ice_ocean_boundary, OS, Ocean_sfc, &
                                OS%grid, OS%US, OS%forcing_CSp, OS%sfc_state, &
                                OS%restore_salinity, OS%restore_temp)
 
-    ! enable_averages() is necessary to post forcing fields to diagnostics
-    call enable_averages(dt_coupling, OS%Time + Ocean_coupling_time_step, OS%diag)
-
     ! Add ice shelf fluxes
     if (OS%use_ice_shelf) then
       if (do_thermo) &