Retired in ISO 639-3: Split between Borana [gax] and Somali [som]
Excerpt from change request document:
Garreh-Ajuran is not a specific language, but rather a pair of closely allied ethnic groups. The Garreh people speak Borana as a first language and Somali as a second language while the Ajuran people are divided into two groups; those who speak Borana as a first language and those who speak Somali as a first language.