Remove Google-era vestigial unit test.
Remove Google-era vestigial unit test.

Change-Id: Ia7a295a5c759a17c1675a3055d287d3e40e9e0fe

entylop/ceres-solver,ysonggit/ceres-solver,whuaegeanse/ceres-solver,kartikkumar/ceres-solver,ikoruk/ceres-solver,jmwalls/ceres-solver-fork,ysonggit/ceres-solver,stonier/ceres_solver,stonier/ceres_solver,ikoruk/ceres-solver,ikoruk/ceres-solver,ysonggit/ceres-solver,timfel/ceres-bin,entylop/ceres-solver,entylop/ceres-solver,DougFirErickson/ceres-solver,ysonggit/ceres-solver,DougFirErickson/ceres-solver,kartikkumar/ceres-solver,stonier/ceres_solver,timfel/ceres-bin,jmwalls/ceres-solver-fork,ikoruk/ceres-solver,stonier/ceres_solver,kartikkumar/ceres-solver,whuaegeanse/ceres-solver,kartikkumar/ceres-solver,DougFirErickson/ceres-solver,whuaegeanse/ceres-solver,timfel/ceres-bin,DougFirErickson/ceres-solver,whuaegeanse/ceres-solver,ikoruk/ceres-solver,entylop/ceres-solver,jmwalls/ceres-solver-fork,timfel/ceres-bin,jmwalls/ceres-solver-fork