Remove the grouped node stuff

test/helpers/test.hpp

@@ -93,8 +93,6 @@ static inline void run_tests()
                   << BOOST_UNORDERED_HAVE_PIECEWISE_CONSTRUCT << "\n"          \
                   << "BOOST_UNORDERED_EMPLACE_LIMIT: "                         \
                   << BOOST_UNORDERED_EMPLACE_LIMIT << "\n"                     \
-                  << "BOOST_UNORDERED_INTEROPERABLE_NODES: "                   \
-                  << BOOST_UNORDERED_INTEROPERABLE_NODES << "\n"               \
                   << "BOOST_UNORDERED_USE_ALLOCATOR_TRAITS: "                  \
                   << BOOST_UNORDERED_USE_ALLOCATOR_TRAITS << "\n"              \
                   << "BOOST_UNORDERED_CXX11_CONSTRUCTION: "                    \

test/unordered/insert_stable_tests.cpp

@@ -47,9 +47,9 @@ std::size_t hash_value(insert_stable::member const& x)
 }
 }
 
-// This is now only supported when using grouped nodes. I can't see any
-// efficient way to do it otherwise.
-#if !BOOST_UNORDERED_INTEROPERABLE_NODES
+// This is no longer supported, as there's no longer an efficient way to get to
+// the end of a group of equivalent nodes.
+#if 0
 
 UNORDERED_AUTO_TEST(stable_insert_test1)
 {

test/unordered/merge_tests.cpp

@@ -99,7 +99,6 @@ UNORDERED_AUTO_TEST(merge_multiset)
     test::check_equivalent_keys(y);
 }
 
-#if BOOST_UNORDERED_INTEROPERABLE_NODES
 UNORDERED_AUTO_TEST(merge_set_and_multiset)
 {
     boost::unordered_set<int> x;
@@ -139,7 +138,6 @@ UNORDERED_AUTO_TEST(merge_set_and_multiset)
     test::check_equivalent_keys(x);
     test::check_equivalent_keys(y);
 }
-#endif
 
 template <class X> void merge_empty_test(X*, test::random_generator generator)
 {