Revert "Added SDL_nextafter() and SDL_nextafterf()"

This reverts commit bc5d074818.

It's not clear that we need these yet, so I'm going to remove them for now.

VisualC-GDK/SDL/SDL.vcxproj

@@ -668,8 +668,6 @@
     <ClCompile Include="..\..\src\libm\s_fabs.c" />
     <ClCompile Include="..\..\src\libm\s_floor.c" />
     <ClCompile Include="..\..\src\libm\s_modf.c" />
-    <ClCompile Include="..\..\src\libm\s_nextafter.c" />
-    <ClCompile Include="..\..\src\libm\s_nextafterf.c" />
     <ClCompile Include="..\..\src\libm\s_scalbn.c" />
     <ClCompile Include="..\..\src\libm\s_sin.c" />
     <ClCompile Include="..\..\src\libm\s_tan.c" />
@@ -787,4 +785,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
+</Project>

VisualC-GDK/SDL/SDL.vcxproj.filters

@@ -985,12 +985,6 @@
     <ClCompile Include="..\..\src\libm\s_modf.c">
       <Filter>libm</Filter>
     </ClCompile>
-    <ClCompile Include="..\..\src\libm\s_nextafter.c">
-      <Filter>libm</Filter>
-    </ClCompile>
-    <ClCompile Include="..\..\src\libm\s_nextafterf.c">
-      <Filter>libm</Filter>
-    </ClCompile>
     <ClCompile Include="..\..\src\libm\s_scalbn.c">
       <Filter>libm</Filter>
     </ClCompile>
@@ -1392,4 +1386,4 @@
   <ItemGroup>
     <ResourceCompile Include="..\..\src\core\windows\version.rc" />
   </ItemGroup>
-</Project>
+</Project>