Delete unused file.

Author: intorr

src/xrCore/FixedSet.h

@@ -478,7 +478,6 @@
     <CustomBuild Include="FileSystem.h" />
     <ClInclude Include="file_stream_reader.h" />
     <ClInclude Include="FixedMap.h" />
-    <ClInclude Include="FixedSet.h" />
     <ClInclude Include="FixedVector.h" />
     <ClInclude Include="FMesh.hpp" />
     <ClInclude Include="FS.h" />

src/xrCore/xrCore.vcxproj

@@ -440,9 +440,6 @@
     <ClInclude Include="FixedMap.h">
       <Filter>Math\STLext</Filter>
     </ClInclude>
-    <ClInclude Include="FixedSet.h">
-      <Filter>Math\STLext</Filter>
-    </ClInclude>
     <ClInclude Include="FixedVector.h">
       <Filter>Math\STLext</Filter>
     </ClInclude>