Merge branch 'element'

wrappers/python/simtk/openmm/app/element.py

@@ -62,7 +62,7 @@ class Element:
         if number in Element._elements_by_atomic_number:
             other_element = Element._elements_by_atomic_number[number]
             if mass < other_element.mass:
-                # If two "elements" sharethe same atomic number, they're
+                # If two "elements" share the same atomic number, they're
                 # probably hydrogen and deuterium, and we want to choose
                 # the lighter one to put in the table by atomic_number,
                 # since it's the "canonical" element.
@@ -85,9 +85,6 @@ def get_by_symbol(symbol):
     s = symbol.strip().upper()
     return Element._elements_by_symbol[s]
 
-def get_by_atomic_number(atomic_number):
-    return Element._elements_by_atomic_number[atomic_number]
-
 
 hydrogen =       Element(  1, "hydrogen", "H", 1.007947*daltons)
 deuterium =      Element(  1, "deuterium", "D", 2.01355321270*daltons)