remove useless old comment

code/LPT_quasi3D_sediments.py

@@ -21,7 +21,6 @@ import sediment_functions as sf
 # ----- Set parameters --------------------------------------------------------_
 number_particles = int(5e3)
 simu_name = "one_month_release_with_rivers_constant_seed_by_site"
-# sed = "fine_silt"
 mesh_name = "gbr_styx_with_rivers"
 close_rivers = False