Style: removed outdated comments and includes.

src/blackmisc/algorithm.h

@@ -50,7 +50,6 @@ namespace BlackMisc
         //! \threadsafe
         inline std::mt19937 &defaultRandomGenerator()
         {
-            //! \fixme Qt 5.10: Use QRandomGenerator.
             static QThreadStorage<std::mt19937> rng;
             if (rng.hasLocalData()) { rng.setLocalData(std::mt19937(static_cast<std::mt19937::result_type>(QRandomGenerator::global()->generate()))); }
             return rng.localData();