Removed obsolete import

bilby/gw/conversion.py

@@ -2,8 +2,9 @@ from __future__ import division
 
 import numpy as np
 
-import pandas as pd
 from ..core.utils import logger, solar_mass
+from ..core.prior import DeltaFunction
+
 try:
     from astropy.cosmology import z_at_value, Planck15
     import astropy.units as u
@@ -17,7 +18,6 @@ except ImportError:
     logger.warning("You do not have lalsuite installed currently. You will"
                    " not be able to use some of the prebuilt functions.")
 
-from ..core.prior import DeltaFunction
 
 
 def redshift_to_luminosity_distance(redshift):