Remove unused variable in evaluate_test.cc
Remove unused variable in evaluate_test.cc

Change-Id: Id5a4abb35d4b86c67dc2c9b0ac59a4950825a23d

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