fixup! Migrate tests to Xunit.Net 2.0

Author: nulltoken

LibGit2Sharp.Tests/app.config

@@ -3,12 +3,4 @@
   <startup>
     <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5"/>
   </startup>
-  <runtime>
-    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
-      <dependentAssembly>
-        <assemblyIdentity name="xunit" publicKeyToken="8d05b1bb7a6fdb6c" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-1.9.2.1705" newVersion="1.9.2.1705" />
-      </dependentAssembly>
-    </assemblyBinding>
-  </runtime>
 </configuration>