unbreak pagemap unittest compilation on msvc
diff --git a/vsprojects/pagemap_unittest/pagemap_unittest.vcxproj b/vsprojects/pagemap_unittest/pagemap_unittest.vcxproj
index 5ee92ef..9a46a8d 100644
--- a/vsprojects/pagemap_unittest/pagemap_unittest.vcxproj
+++ b/vsprojects/pagemap_unittest/pagemap_unittest.vcxproj
@@ -125,7 +125,6 @@
     </ClCompile>

     <Link>

       <SubSystem>Console</SubSystem>

-      <ForceSymbolReferences>__tcmalloc;%(ForceSymbolReferences)</ForceSymbolReferences>

     </Link>

   </ItemDefinitionGroup>

   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">