Remove diffusion score from statepoint.py.

src/utils/statepoint.py

@@ -17,14 +17,13 @@ score_types = {-1: 'flux',
                 -5: 'scatter-n',
                 -6: 'scatter-pn',
                 -7: 'transport',
-                -8: 'diffusion',
-                -9: 'n1n',
-                -10: 'absorption',
-                -11: 'fission',
-                -12: 'nu-fission',
-                -13: 'kappa-fission',
-                -14: 'current',
-                -15: 'events',
+                -8: 'n1n',
+                -9: 'absorption',
+                -10: 'fission',
+                -11: 'nu-fission',
+                -12: 'kappa-fission',
+                -13: 'current',
+                -14: 'events',
                 1: '(n,total)',
                 2: '(n,elastic)',
                 4: '(n,level)',