[2432] Remove iter variable

src/lib/dns/tests/rrset_collection_unittest.cc

@@ -141,8 +141,7 @@ TEST_F(RRsetCollectionTest, addAndRemove) {
 
 TEST_F(RRsetCollectionTest, iteratorTest) {
     // The collection must not be empty.
-    RRsetCollection::iterator iter = collection.begin();
-    EXPECT_NE(collection.end(), iter);
+    EXPECT_NE(collection.end(), collection.begin());
 
     // Here, we just count the records and do some basic tests on them.
     size_t count = 0;