Remove racy DCHECK on string dex cache.

Test: test-art-host
Change-Id: I58940031d43d89f434d3c3239a218b99ebb1106b
diff --git a/runtime/class_linker-inl.h b/runtime/class_linker-inl.h
index a11257f..cdcc84d 100644
--- a/runtime/class_linker-inl.h
+++ b/runtime/class_linker-inl.h
@@ -81,9 +81,6 @@
     Handle<mirror::DexCache> dex_cache(hs.NewHandle(declaring_class->GetDexCache()));
     const DexFile& dex_file = *dex_cache->GetDexFile();
     string = ResolveString(dex_file, string_idx, dex_cache);
-    if (string != nullptr) {
-      DCHECK_EQ(dex_cache->GetResolvedString(string_idx), string);
-    }
   }
   return string.Ptr();
 }