Remove q_cons_vf optional variable guard

Author: Mark Zhang

src/simulation/m_ibm.fpp

@@ -970,9 +970,6 @@ contains
                     if (igr) then
                         ! For IGR, we will need to perform operations on
                         ! the conservative variables instead
-                        if (.not. present(q_cons_vf) .and. proc_rank == 0) then
-                            call s_mpi_abort("q_cons_vf is required inside s_interpolate_image_point when running with IGR")
-                        end if
                         alpha_sum = 0._wp
                         dyn_pres = 0._wp
                         if (num_fluids == 1) then