Delete provenance.py
Delete provenance.py

I am very sorry but I have to delete this file, since it doesnt pass TRAVIS CI tests. Some errors are: 
/home/travis/build/dispel4py/dispel4py/dispel4py/provenance.py:29:1: F401 'pickle' imported but unused

/home/travis/build/dispel4py/dispel4py/dispel4py/provenance.py:39:5: F401 'repr' imported but unused

/home/travis/build/dispel4py/dispel4py/dispel4py/provenance.py:63:5: E731 do not assign a lambda expression, use a def

/home/travis/build/dispel4py/dispel4py/dispel4py/provenance.py:337:1: E302 expected 2 blank lines, found 1

/home/travis/build/dispel4py/dispel4py/dispel4py/provenance.py:344:58: E225 missing whitespace around operator
dispel4py/dispel4py,dispel4py/dispel4py