SINGA-243: ViennaCL Backend: Removed errant FindOpenCL find.
SINGA-243: ViennaCL Backend: Removed errant FindOpenCL find.

nusdbsystem/incubator-singa,nudles/incubator-singa,nusdbsystem/incubator-singa,kaiping/incubator-singa,apache/incubator-singa,nudles/incubator-singa,wangsheng1001/incubator-singa,ijingo/incubator-singa,ijingo/incubator-singa,nudles/incubator-singa,ijingo/incubator-singa,nudles/incubator-singa,wangsheng1001/incubator-singa,kaiping/incubator-singa,nusdbsystem/incubator-singa,apache/incubator-singa,kaiping/incubator-singa,kaiping/incubator-singa,wangsheng1001/incubator-singa,apache/incubator-singa,apache/incubator-singa,ijingo/incubator-singa,wangsheng1001/incubator-singa,nusdbsystem/incubator-singa,ijingo/incubator-singa,apache/incubator-singa,nudles/incubator-singa,wangsheng1001/incubator-singa,nusdbsystem/incubator-singa,kaiping/incubator-singa