LinearSolver::Options::num_eliminate_blocks is dead.

Replaced with LinearSolver::Options::elimination_groups.

Change-Id: I7c07542ec19279a35ddf6da498d417a79395c77f
diff --git a/internal/ceres/schur_eliminator_test.cc b/internal/ceres/schur_eliminator_test.cc
index 0b55a14..56db598 100644
--- a/internal/ceres/schur_eliminator_test.cc
+++ b/internal/ceres/schur_eliminator_test.cc
@@ -149,10 +149,10 @@
     Vector rhs(schur_size);
 
     LinearSolver::Options options;
-    options.num_eliminate_blocks = num_eliminate_blocks;
+    options.elimination_groups.push_back(num_eliminate_blocks);
     if (use_static_structure) {
       DetectStructure(*bs,
-                      options.num_eliminate_blocks,
+                      num_eliminate_blocks,
                       &options.row_block_size,
                       &options.e_block_size,
                       &options.f_block_size);