Use brace initializers for DiscreteValues in hybrid

gtsam/hybrid/tests/testHybridBayesNet.cpp

@@ -237,8 +237,7 @@ TEST(HybridBayesNet, Error) {
   EXPECT(assert_equal(expected_pruned_error, pruned_error_tree, 1e-9));
 
   // Verify error computation and check for specific error value
-  DiscreteValues discrete_values;
-  boost::assign::insert(discrete_values)(M(0), 1)(M(1), 1);
+  DiscreteValues discrete_values {{M(0), 1}, {M(1), 1}};
 
   double total_error = 0;
   for (size_t idx = 0; idx < hybridBayesNet->size(); idx++) {

gtsam/hybrid/tests/testHybridGaussianFactorGraph.cpp

@@ -40,7 +40,6 @@
 #include <gtsam/linear/JacobianFactor.h>
 
 #include <algorithm>
-#include <boost/assign/std/map.hpp>
 #include <cstddef>
 #include <functional>
 #include <iostream>
@@ -49,8 +48,6 @@
 
 #include "Switching.h"
 
-using namespace boost::assign;
-
 using namespace std;
 using namespace gtsam;