Removed code that was duplicated in pepapot.py and test_pepapot.py, specifically relating to obtaining an environment mapping constant names to values from a list of constant definitions.
Removed code that was duplicated in pepapot.py and test_pepapot.py, specifically relating to obtaining an environment mapping constant names to values from a list of constant definitions.

ageorgou/pepapot,allanderek/pepapot,allanderek/pepapot,ageorgou/pepapot