numpy matrix is deprecated so remove it

Don't try "support" numpy.matrix since this is deprecated

If it ever becomes an issue we can put it back and silence the
deprecation warning.

Author: rocky

mathics/builtin/pympler/asizeof.py

@@ -1502,8 +1502,7 @@ def _numpy_kwds(obj):
     _all_lens += (_len_numpy,)
 
     _numpy_types = ()
-    for d in (numpy.array(range(0)), numpy.arange(0),
-              numpy.matrix(range(0)), numpy.ma.masked_array([])):
+    for d in (numpy.array(range(0)), numpy.arange(0)):
         t = type(d)
         if t not in _numpy_types:
             _numpy_types += (t,)