MAINT: clean unused imports.

Author: pavoljuhas

examples/compareC60PDFs.py

@@ -6,7 +6,7 @@
 
 import sys
 import os
-from matplotlib.pyplot import plot, show, clf, draw
+from matplotlib.pyplot import plot, show, clf
 from diffpy.structure import Structure
 from diffpy.srreal.pdfcalculator import PDFCalculator, DebyePDFCalculator
 

examples/compareC60PDFs_objcryst.py

@@ -4,7 +4,7 @@
 The C60 molecule are stored in a pyobjcryst object.
 """
 
-from matplotlib.pyplot import plot, show, clf, draw
+from matplotlib.pyplot import plot, show, clf
 from diffpy.structure import Structure
 from pyobjcryst.crystal import Crystal
 from pyobjcryst.molecule import Molecule

examples/parallelPDF.py

@@ -71,7 +71,7 @@
 print("Time ratio: %g" % (t0 / t1))
 
 # plot both results and the difference curve
-from matplotlib.pyplot import plot, show, clf, draw
+from matplotlib.pyplot import plot, show, clf
 clf()
 gd = g0 - g1
 plot(r0, g0, r1, g1, r0, gd - 3)