Cleanup.

Author: Oren (electricessence)

Open.ChannelExtensions/Extensions.Join.cs

@@ -1,6 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Diagnostics.Contracts;
+using System.Collections.Generic;
 using System.Threading.Channels;
 using System.Threading.Tasks;
 

Open.ChannelExtensions/Open.ChannelExtensions.csproj

@@ -19,7 +19,7 @@ Part of the "Open" set of libraries.
     <RepositoryType>git</RepositoryType>
     <PackageTags>channels dotnet threading tasks extensions</PackageTags>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
-    <Version>2.7.0</Version>
+    <Version>3.0.0-preview</Version>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
     <PackageReleaseNotes></PackageReleaseNotes>
     <RepositoryUrl>https://github.com/electricessence/Open.ChannelExtensions</RepositoryUrl>
@@ -34,7 +34,7 @@ Part of the "Open" set of libraries.
 	</PropertyGroup>
 
 	<ItemGroup>
-    <PackageReference Include="System.Threading.Channels" Version="4.6.0" />
+    <PackageReference Include="System.Threading.Channels" Version="4.5.0" />
   </ItemGroup>
 
 </Project>