Be better at removing dead links

projects/vfs/src/python/vfs/impl.py

@@ -51,10 +51,14 @@ class Vfs(object):
 
             elif e[0] == "unlink":
                 _, dest = e
-                if dest.is_dir():
+                if dest.is_symlink():
+                    dest.unlink()
+                elif dest.is_dir():
                     rmtree(dest)
                 elif dest.is_file():
                     dest.unlink()
+                else:
+                    raise Exception(f"Couldn't unlink {dest}")
 
     def _append(self, msg):
         self._log.append(msg)