updated plotly.py to use new syntax and tools.get_config_file().
updated plotly.py to use new syntax and tools.get_config_file().

(also deleted some things that were commented out)

ee-in/python-api,ee-in/python-api,plotly/python-api,plotly/plotly.py,ee-in/python-api,plotly/plotly.py,plotly/python-api,plotly/plotly.py,plotly/python-api