Common/MathUtil: Remove MathFloatVectorSum()

This isn't used anywhere and not really a generic utility, so we can get
rid of it.

This also lets us remove MathUtil.cpp, since this was the only thing
within that file.

Source/Core/Common/CMakeLists.txt

@@ -80,7 +80,6 @@ add_library(common
   Logging/Log.h
   Logging/LogManager.cpp
   Logging/LogManager.h
-  MathUtil.cpp
   MathUtil.h
   Matrix.cpp
   Matrix.h

Source/Core/Common/MathUtil.cpp

@@ -1,12 +0,0 @@
-// Copyright 2008 Dolphin Emulator Project
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-#include "Common/MathUtil.h"
-
-#include <numeric>
-
-// Calculate sum of a float list
-float MathFloatVectorSum(const std::vector<float>& Vec)
-{
-  return std::accumulate(Vec.begin(), Vec.end(), 0.0f);
-}

Source/Core/Common/MathUtil.h

@@ -8,7 +8,6 @@
 #include <cmath>
 #include <limits>
 #include <type_traits>
-#include <vector>
 
 #include "Common/CommonTypes.h"
 
@@ -188,8 +187,6 @@ private:
 
 }  // namespace MathUtil
 
-float MathFloatVectorSum(const std::vector<float>&);
-
 // Rounds down. 0 -> undefined
 constexpr int IntLog2(u64 val)
 {

Source/Core/DolphinLib.props

@@ -773,7 +773,6 @@
     <ClCompile Include="Common\LdrWatcher.cpp" />
     <ClCompile Include="Common\Logging\ConsoleListenerWin.cpp" />
     <ClCompile Include="Common\Logging\LogManager.cpp" />
-    <ClCompile Include="Common\MathUtil.cpp" />
     <ClCompile Include="Common\Matrix.cpp" />
     <ClCompile Include="Common\MemArenaWin.cpp" />
     <ClCompile Include="Common\MemoryUtil.cpp" />