remove synonym.evidence.  this should have been done when we added synonym.datasets.  Refs #2066
remove synonym.evidence.  this should have been done when we added synonym.datasets.  Refs #2066


Former-commit-id: 375dd89e66a3bc022b0bb19e9f62c7e9fb551ae9
julie-sullivan/phytomine,julie-sullivan/phytomine,julie-sullivan/phytomine,julie-sullivan/phytomine,julie-sullivan/phytomine,julie-sullivan/phytomine,julie-sullivan/phytomine