Fix project file corruption.

Author: yfakariya

src/MsgPack.Silverlight.WindowsPhone/MsgPack.Silverlight.WindowsPhone.csproj

@@ -682,7 +682,6 @@
     <Compile Include="..\MsgPack\UnpackingStreamReader.cs">
       <Link>UnpackingStreamReader.cs</Link>
     </Compile>
-    </Compile>
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>
   <ItemGroup>