Trac #33174: Unreachable code in sage/graphs/base/c_graph.pyx

The body of this function is unreachable,

{{{#!python
cdef bint _has_labeled_edge_unsafe(self, int u_int, int v_int, object l)
except -1:
    """
    Return whether ``self`` has an arc specified by indices of the
vertices
    and an arc label.
    """
    raise NotImplementedError
    cdef int l_int
    if l is None:
        l_int = 0
    else:
        l_int = self.new_edge_label(l)
    return self.cg().has_arc_unsafe(u_int, v_int, l_int)
}}}

Is it just an oversight?

URL: https://trac.sagemath.org/33174
Reported by: mjo
Ticket author(s): David Coudert
Reviewer(s): Michael Orlitzky

src/sage/graphs/base/c_graph.pyx

@@ -2600,12 +2600,6 @@ cdef class CGraphBackend(GenericGraphBackend):
         and an arc label.
         """
         raise NotImplementedError
-        cdef int l_int
-        if l is None:
-            l_int = 0
-        else:
-            l_int = self.new_edge_label(l)
-        return self.cg().has_arc_unsafe(u_int, v_int, l_int)
 
     cdef int free_edge_label(self, int l_int) except -1:
         raise NotImplementedError()