Core/Common: Use the std make_unique instead of a custom one

(cherry picked from commit ca023fd60a)

src/common/Common.h

@@ -132,12 +132,7 @@ struct TC_COMMON_API LocalizedString
 
 namespace Trinity
 {
-    //! std::make_unique implementation (TODO: remove this once C++14 is supported)
-    template<typename T, typename ...Args>
-    std::unique_ptr<T> make_unique(Args&& ...args)
-    {
-        return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
-    }
+    using std::make_unique;
 }
 
 #endif