thread/windows: Remove synchronization.lib from WinPhone81 dependencies

synch APIs are implicitly available on this platform.

VisualC-WinRT/WinPhone81_VS2013/SDL-WinPhone81.vcxproj

@@ -431,7 +431,7 @@
       <SubSystem>Console</SubSystem>
       <IgnoreAllDefaultLibraries>false</IgnoreAllDefaultLibraries>
       <GenerateWindowsMetadata>false</GenerateWindowsMetadata>
-      <AdditionalDependencies>DXGI.lib;d3d11.lib;mmdevapi.lib;synchronization.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>DXGI.lib;d3d11.lib;mmdevapi.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
@@ -445,7 +445,7 @@
       <SubSystem>Console</SubSystem>
       <IgnoreAllDefaultLibraries>false</IgnoreAllDefaultLibraries>
       <GenerateWindowsMetadata>false</GenerateWindowsMetadata>
-      <AdditionalDependencies>DXGI.lib;d3d11.lib;mmdevapi.lib;synchronization.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>DXGI.lib;d3d11.lib;mmdevapi.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|arm'">
@@ -459,7 +459,7 @@
       <SubSystem>Console</SubSystem>
       <IgnoreAllDefaultLibraries>false</IgnoreAllDefaultLibraries>
       <GenerateWindowsMetadata>false</GenerateWindowsMetadata>
-      <AdditionalDependencies>DXGI.lib;d3d11.lib;mmdevapi.lib;synchronization.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>DXGI.lib;d3d11.lib;mmdevapi.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|arm'">
@@ -473,7 +473,7 @@
       <SubSystem>Console</SubSystem>
       <IgnoreAllDefaultLibraries>false</IgnoreAllDefaultLibraries>
       <GenerateWindowsMetadata>false</GenerateWindowsMetadata>
-      <AdditionalDependencies>DXGI.lib;d3d11.lib;mmdevapi.lib;synchronization.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>DXGI.lib;d3d11.lib;mmdevapi.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />