Unreachable code in ColoredHyperGraph, ColoredHyperGraphView, and CombinatorialComplex

[gurug-dev]

What/Where?

• CHG - degree_matrix, line 1125: incidence_matrix will never be 0,0 shape due to compute_set_incidence
• CHG - laplacian_matrix, line 1163: adjacency_matrix will never be 0,0 shape due to compute_set_incidence
• CHG/CCC - _remove_hyperedge the case -> isinstance(hyperedge, Hashable) and not isinstance(hyperedge, Iterable) is not valid as previous check if hyperedge not in self.cells filters out any object not already present in self.cells and self.cells can only contain hashable and iterable elements like frozenset, etc
• CHGView - __contains__ : elif isinstance(hyperedge_elements, HyperEdge) case is unreachable as hyperedge_elements is unpacked earlier if it is HyperEdge object.
• CCC - _CCC_condition method is not well defined, CCC._node_membership is an empty set for a defined CCC.

  combinatorial_complex = CombinatorialComplex([[1, 2, 3], [2, 3, 4]], ranks=2)
  combinatorial_complex._CCC_condition([None], 2)  # doesn't throw an error.