CLN: optimize: remove unused variable D from _cubicmin() in linesearch.py
CLN: optimize: remove unused import and unused variable in cobyla.py
CLN: optimize: remove unused imports from setupscons.py
CLN: optimize: remove unused import from nonlin.py
CLN: optimize: remove some unused variables in optimize.py
DOC: optimize: fix a typo in the anneal docstring
PEP8: optimize: clean up anneal.py
PEP8: optimize: tiny tweak to _basinhopping.py
PEP8: optimize: cleanup cobyla.py and lbfgsb.py
PEP8: optimize: some cleanup (PEP8 and minor style tweaks) in linesearch.py
PEP8: optimize: cleanup (PEP8 and a couple minor style changes) in minpack.py
PEP8: optimize: cleanup nnls.py
STY: optimize: better whitespace alignment in a few lines in anneal.py
Merge pull request #475 from WarrenWeckesser/optimize-cleanup

MAINT: optimize: Some code cleanup