dirstate: drop last explicite `state` usage in status

Given that the previous conditional we can safely use `tracked` here.

Differential Revision: https://phab.mercurial-scm.org/D10976

mercurial/dirstate.py

@@ -1321,7 +1321,7 b' class dirstate(object):'
                 aadd(fn)
             elif t.removed:
                 radd(fn)
-            elif state == b'n':
+            elif t.tracked:
                 if (
                     size >= 0
                     and (