networkx: Add return types to algorithms/approximation/clique.pyi (#14660)

Author: MeGaGiGaGon

stubs/networkx/networkx/algorithms/approximation/clique.pyi

@@ -1,15 +1,13 @@
-from _typeshed import Incomplete
-
 from networkx.classes.graph import Graph, _Node
 from networkx.utils.backends import _dispatchable
 
 __all__ = ["clique_removal", "max_clique", "large_clique_size", "maximum_independent_set"]
 
 @_dispatchable
-def maximum_independent_set(G: Graph[_Node]) -> set[Incomplete]: ...
+def maximum_independent_set(G: Graph[_Node]) -> set[_Node]: ...
 @_dispatchable
-def max_clique(G: Graph[_Node]) -> set[Incomplete]: ...
+def max_clique(G: Graph[_Node]) -> set[_Node]: ...
 @_dispatchable
-def clique_removal(G: Graph[_Node]): ...
+def clique_removal(G: Graph[_Node]) -> tuple[set[_Node], list[set[_Node]]]: ...
 @_dispatchable
-def large_clique_size(G: Graph[_Node]): ...
+def large_clique_size(G: Graph[_Node]) -> int: ...