move to alpha release

NuGet.config

@@ -1,7 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <configuration>
   <packageSources>
-    <add key="myget.org sixlabors" value="https://www.myget.org/F/sixlabors/api/v3/index.json" />
     <add key="myget.org dotnet-core" value="https://dotnet.myget.org/F/dotnet-core/api/v3/index.json" />
     <add key="nuget.org" value="https://api.nuget.org/v3/index.json" />
     <add key="nuget.org" value="https://www.nuget.org/api/v2/" />

src/ImageSharp.Drawing.Text/DrawText.cs

@@ -12,7 +12,6 @@ namespace ImageSharp
     using Drawing.Pens;
 
     using SixLabors.Fonts;
-    using System.Linq;
 
     /// <summary>
     /// Extension methods for the <see cref="Image{TColor}"/> type.

src/ImageSharp.Drawing.Text/project.json

@@ -41,7 +41,7 @@
     "ImageSharp": {
       "target": "project"
     },
-    "SixLabors.Fonts": "0.1.0-ci0041",
+    "SixLabors.Fonts": "0.1.0-alpha0001",
     "ImageSharp.Drawing.Paths": {
       "target": "project"
     },