Remove using

Author: davidwengier

src/Razor/src/Microsoft.CodeAnalysis.Remote.Razor/UriPresentation/RemoteUriPresentationService.cs

@@ -2,7 +2,6 @@
 // Licensed under the MIT license. See License.txt in the project root for license information.
 
 using System;
-using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.CodeAnalysis.ExternalAccess.Razor;