dirstate-item: implement `removed` in a simpler way

We can simply use the underlying attribute.

Differential Revision: https://phab.mercurial-scm.org/D11370

mercurial/pure/parsers.py

@@ -300,7 +300,7 b' class DirstateItem(object):'
     @property
     def removed(self):
         """True if the file has been removed"""
-        return self.v1_state() == b'r'
+        return not self._wc_tracked and (self._p1_tracked or self._p2_tracked)
 
     @property
     def merged_removed(self):