Fix build.

Author: intorr

Externals/tbbmalloc.vcxproj

@@ -30,7 +30,6 @@
     <ProjectGuid>{B15F131E-328A-4D42-ADC2-9FF4CA6306D8}</ProjectGuid>
     <RootNamespace>tbbmalloc</RootNamespace>
     <Keyword>Win32Proj</Keyword>
-    <WindowsTargetPlatformVersion>10.0.14393.0</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Label="Configuration">