Update potential_energy_two_charges.py

Author: SRUTIGUDURU

electronics/potential_energy_two_charges.py

@@ -2,11 +2,7 @@
 
 k_e = 8.99 * (10**9)  # N·m²/C², Coulomb's constant
 
-# Reference:
-# https://phys.libretexts.org/Bookshelves/University_Physics/
-# University_Physics_(OpenStax)/University_Physics_II_-_Thermodynamics_
-# Electricity_and_Magnetism_(OpenStax)/07%3A_Electric_Potential/7.02%3A_
-# Electric_Potential_Energy
+"""Reference: https://en.wikipedia.org/wiki/Electric_potential_energy"""
 
 
 def potential_energy_2_charges(