Removed import instructions of deprecated numpy functions - cast and product

Author: afluerasu

pyCHX/chx_crosscor.py

@@ -350,7 +350,6 @@ def _centered(img, sz):
     asarray,
     atleast_1d,
     atleast_2d,
-    cast,
     dot,
     exp,
     expand_dims,
@@ -369,7 +368,6 @@ def _centered(img, sz):
     polysub,
     polyval,
     prod,
-    product,
     r_,
     ravel,
     real_if_close,