CHEBI_50864 'insulin-sensitizing drug' uses an obsolete class in logical def

[nicolevasilevsky]

The logical def for CHEBI_50864 'insulin-sensitizing drug' is
application and (sensitizer_of some GO_0016088)

GO_0016088 is obsolete
http://amigo.geneontology.org/amigo/term/GO:0016088