Remove depth preference

src/pip/_internal/resolution/resolvelib/provider.py

@@ -158,22 +158,6 @@ def get_preference(
         pinned = any(op[:2] == "==" for op in operators)
         unfree = bool(operators)
 
-        try:
-            requested_order: Union[int, float] = self._user_requested[identifier]
-        except KeyError:
-            requested_order = math.inf
-            if has_information:
-                parent_depths = (
-                    self._known_depths[parent.name] if parent is not None else 0.0
-                    for _, parent in information[identifier]
-                )
-                inferred_depth = min(d for d in parent_depths) + 1.0
-            else:
-                inferred_depth = math.inf
-        else:
-            inferred_depth = 1.0
-        self._known_depths[identifier] = inferred_depth
-
         requested_order = self._user_requested.get(identifier, math.inf)
 
         # Requires-Python has only one candidate and the check is basically
@@ -190,7 +174,6 @@ def get_preference(
             not direct,
             not pinned,
             not backtrack_cause,
-            inferred_depth,
             requested_order,
             not unfree,
             identifier,