Updates Package metadata

Author: soernt

source/Marten.AspNetCore.Identity/Marten.AspNetCore.Identity.csproj

@@ -12,7 +12,6 @@
         <Description>A Marten UserStore and RoleStore adapter for Microsoft.Extensions.Identity.Core 6.</Description>
         <PackageReadmeFile>README.md</PackageReadmeFile>
         <PackageProjectUrl>https://github.com/soernt/AspNetCore.Identity.Marten</PackageProjectUrl>
-        <license type="expression">MIT</license>
         <PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
         <Copyright>Copyright 2021 (c) Sörnt Poppe. All rights reserved.</Copyright>
         <PackageTags>aspnetcore marten identity membership</PackageTags>