Update NHibernate.csproj

Author: hazzik

src/NHibernate/NHibernate.csproj

@@ -86,7 +86,6 @@
       <HintPath>..\packages\Remotion.Linq.EagerFetching.2.1.0\lib\net45\Remotion.Linq.EagerFetching.dll</HintPath>
     </Reference>
     <Reference Include="System" />
-    <Reference Include="System.ComponentModel.Composition" />
     <Reference Include="System.Core" />
     <Reference Include="System.Data" />
     <Reference Include="System.ServiceModel" />
@@ -1845,4 +1844,4 @@
     <Error Condition="!Exists('..\packages\Antlr3.3.5.1\build\Antlr3.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Antlr3.3.5.1\build\Antlr3.targets'))" />
   </Target>
   <Import Project="..\packages\Antlr3.3.5.1\build\Antlr3.targets" Condition="Exists('..\packages\Antlr3.3.5.1\build\Antlr3.targets')" />
-</Project>
+</Project>