minor cleanup

ortools/graph/BUILD.bazel

@@ -858,7 +858,7 @@ cc_test(
     deps = [
         ":iterators",
         "//ortools/base:gmock_main",
-        "//ortools/base:int_type",
+        "//ortools/base:strong_int",
     ],
 )
 

ortools/graph/iterators_test.cc

@@ -18,12 +18,12 @@
 #include <vector>
 
 #include "gtest/gtest.h"
-#include "ortools/base/int_type.h"
+#include "ortools/base/strong_int.h"
 
 namespace util {
 namespace {
 
-DEFINE_INT_TYPE(TestIndex, int64_t);
+DEFINE_STRONG_INT_TYPE(TestIndex, int64_t);
 
 #if __cplusplus >= 202002L
 static_assert(std::random_access_iterator<IntegerRangeIterator<int>>);