Remove the last usage of Math.hpp

src/openrct2/core/Math.hpp

@@ -1,27 +0,0 @@
-/*****************************************************************************
- * Copyright (c) 2014-2018 OpenRCT2 developers
- *
- * For a complete list of all authors, please refer to contributors.md
- * Interested in contributing? Visit https://github.com/OpenRCT2/OpenRCT2
- *
- * OpenRCT2 is licensed under the GNU General Public License version 3.
- *****************************************************************************/
-
-#pragma once
-
-#include <algorithm>
-
-/**
- * Common mathematical functions.
- */
-namespace Math
-{
-    template<typename T> static T Sign(T x)
-    {
-        if (x < 0)
-            return -1;
-        if (x > 0)
-            return 1;
-        return 0;
-    }
-} // namespace Math

src/openrct2/scenario/ScenarioRepository.cpp

@@ -18,7 +18,6 @@
 #include "../core/File.h"
 #include "../core/FileIndex.hpp"
 #include "../core/FileStream.hpp"
-#include "../core/Math.hpp"
 #include "../core/Path.hpp"
 #include "../core/String.hpp"
 #include "../core/Util.hpp"
@@ -48,7 +47,10 @@ static int32_t ScenarioCategoryCompare(int32_t categoryA, int32_t categoryB)
         return -1;
     if (categoryB == SCENARIO_CATEGORY_BUILD_YOUR_OWN)
         return 1;
-    return Math::Sign(categoryA - categoryB);
+    if (categoryA < categoryB)
+        return -1;
+    else
+        return 1;
 }
 
 static int32_t scenario_index_entry_CompareByCategory(const scenario_index_entry& entryA, const scenario_index_entry& entryB)