Remove TODO from previous commit

Better think twice before pushing...

In fact, it would be better not to compare the wavelength grid sizes if
most modules change the grid *and* have a new grid of the same size
(that's not the case).

pcigale/sed/__init__.py

@@ -234,8 +234,6 @@ class SED(object):
         else:
             # If the added luminosity contribution changes the SED wavelength
             # grid, we interpolate everything on a common wavelength grid.
-            # TODO: If most modules change the grid, maybe it's better not to
-            # test the grid size first.
             if (results_wavelengths.size != self.wavelength_grid.size or
                     not np.all(results_wavelengths == self.wavelength_grid)):
                 # Compute the new wavelength grid for the spectrum.