Another extinct Buru language is the fragmentarily attested Hukumina language.
The Taliabo languages (Kadai, Padang/Samala, Mananga, Mangei/Soboyo) were once included, but turn out to be Celebic.[1]
References
^Charles Grimes & Owen Edwards (in process) Wallacean subgroups: unravelling the prehistory and classification of the Austronesian languages of eastern Indonesia and Timor-Leste. Summary presentation at the 15th International Conference on Austronesian Linguistics.