Remove unused variable in evaluate_test.cc

Change-Id: Id5a4abb35d4b86c67dc2c9b0ac59a4950825a23d

internal/ceres/evaluator_test.cc

diff --git a/internal/ceres/evaluator_test.cc b/internal/ceres/evaluator_test.cc
index c3b3fa4..6c8e6f1 100644
--- a/internal/ceres/evaluator_test.cc
+++ b/internal/ceres/evaluator_test.cc
@@ -479,7 +479,6 @@
   double x[2];
   double y[3];
   double z[4];
-  double state[9];
 
   // Add the parameters in explicit order to force the ordering in the program.
   problem.AddParameterBlock(x,  2);