[SL.Core] do not share internals across SixLabors projects

src/SixLabors.Core/Properties/AssemblyInfo.cs

@@ -5,11 +5,3 @@ using System.Runtime.CompilerServices;
 
 // Ensure the internals can be tested.
 [assembly: InternalsVisibleTo("SixLabors.Core.Tests")]
-
-// Ensure the internals are visible to the other projects.
-[assembly: InternalsVisibleTo("SixLabors.Exif")]
-[assembly: InternalsVisibleTo("SixLabors.Fonts")]
-[assembly: InternalsVisibleTo("SixLabors.ImageSharp")]
-[assembly: InternalsVisibleTo("SixLabors.ImageSharp.Drawing")]
-[assembly: InternalsVisibleTo("SixLabors.Shapes")]
-[assembly: InternalsVisibleTo("SixLabors.Shapes.Text")]