Use this if you are using igraph from R
| delete_edge_attr {igraph} | R Documentation | 
Delete an edge attribute
delete_edge_attr(graph, name)
| graph | The graph | 
| name | The name of the edge attribute to delete. | 
The graph, with the specified edge attribute removed.
Other graph attributes: 
delete_graph_attr(),
delete_vertex_attr(),
edge_attr<-(),
edge_attr_names(),
edge_attr(),
graph_attr<-(),
graph_attr_names(),
graph_attr(),
igraph-dollar,
igraph-vs-attributes,
set_edge_attr(),
set_graph_attr(),
set_vertex_attr(),
vertex_attr<-(),
vertex_attr_names(),
vertex_attr()
g <- make_ring(10) %>%
  set_edge_attr("name", value = LETTERS[1:10])
edge_attr_names(g)
g2 <- delete_edge_attr(g, "name")
edge_attr_names(g2)