remove basis.data.Object#isTarget fallback
remove basis.data.Object#isTarget fallback

basisjs/basisjs,istrel/basisjs,basisjs/basisjs,smelukov/basisjs,fateevv/basisjs,tyanas/basisjs,fateevv/basisjs,fateevv/basisjs,smelukov/basisjs,smelukov/basisjs,tyanas/basisjs,tyanas/basisjs,istrel/basisjs,istrel/basisjs,basisjs/basisjs