Remove most of the unordered_ stuff and use the standard equivalents instead.

Change-Id: I01c6f195fd2cf6edbe430fb31e99b2e2748c2088
diff --git a/src/intern_table_test.cc b/src/intern_table_test.cc
index a0c47ec..b6ecdc6 100644
--- a/src/intern_table_test.cc
+++ b/src/intern_table_test.cc
@@ -88,7 +88,7 @@
 
   EXPECT_EQ(2U, t.Size());
 
-  // Just check that we didn't corrupt the unordered_multimap.
+  // Just check that we didn't corrupt the map.
   SirtRef<String> still_here(String::AllocFromModifiedUtf8("still here"));
   t.InternWeak(still_here.get());
   EXPECT_EQ(3U, t.Size());