Removed obsolete using

FlorianRappl · FlorianRappl · commit 3cf5e00a69e3 · 2016-05-06T13:11:34.000+02:00
diff --git a/src/AngleSharp.Io.Tests/Network/HttpClientRequesterTests.cs b/src/AngleSharp.Io.Tests/Network/HttpClientRequesterTests.cs
@@ -2,7 +2,6 @@
 {
     using AngleSharp.Extensions;
     using AngleSharp.Io.Network;
-    using AngleSharp.Extensions;
     using AngleSharp.Io.Tests.Network.Mocks;
     using AngleSharp.Network;
     using AngleSharp.Services.Default;

Original file line number	Diff line number	Diff line change
`@@ -2,7 +2,6 @@`
`2`	`2`	`{`
`3`	`3`	`using AngleSharp.Extensions;`
`4`	`4`	`using AngleSharp.Io.Network;`
`5`		`- using AngleSharp.Extensions;`
`6`	`5`	`using AngleSharp.Io.Tests.Network.Mocks;`
`7`	`6`	`using AngleSharp.Network;`
`8`	`7`	`using AngleSharp.Services.Default;`