Removing Data from a Shared Object

Does anyone know if it’s possible to remove an array property and its values from a Shared Object?

For example, if the SO contains the following:

elemArray_1: 56-02-136,136Ba,Barium,93.0
elemArray_2: 18-03-40,40Ar,Argon,>99.999
elemArray_3: 51-02-123,123Sb,Antimony,98.2

How can I delete “elemArray_2” entirely? - Rather than just set the individual values to undefined? (I would then refresh the display by reading the updated cookie props)