Remove unnecessary method

[lguerard]

We can remove this method

python-imcflibs/src/imcflibs/imagej/objects3d.py

Line 120 in 26f64c9

def get_objects_within_intensity(obj_pop, imp, min_intensity, max_intensity):

as my PR got merged in the latest version of the Image3D suite : https://framagit.org/mcib3d/mcib3d-core/-/blob/master/src/main/java/mcib3d/geom/Objects3DPopulation.java?ref_type=heads#L1520