Delete functions from DEVS that are deployed in production modules

[ambarb]

DEVS looks to be a proving ground. Sometimes those functions are deleted when they are deployed to "live" modules. Sometimes it is not. I've compared functions and will list here findings.

very safe to delete from DEVS.py

• fit_one_peak_curve ; better function in chi_generic_functions

  pyCHX/pyCHX/chx_generic_functions.py

  Line 74 in 6e991bb

  def fit_one_peak_curve( x,y, fit_range=None ):

• plot_xy_with_fit ; same function in chi_generic_functions

  pyCHX/pyCHX/chx_generic_functions.py

  Line 114 in 6e991bb

  def plot_xy_with_fit( x, y, xf, out,

• next function goes here......

need expert eye