[grenoble] Remove (temporarily) the virtual feature for edel.

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-28.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-29.json

data/grid5000/sites/grenoble/clusters/edel/nodes/edel-3.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-30.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-31.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-32.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-33.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-34.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-35.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-36.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-37.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-38.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-39.json

data/grid5000/sites/grenoble/clusters/edel/nodes/edel-4.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-40.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-41.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-42.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-43.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-44.json

.../grid5000/sites/grenoble/clusters/edel/nodes/edel-45.json