Remove unused fat

src/Infrastructure/DependencyInjection.cs

@@ -1,5 +1,4 @@
-using Hutopy.Domain.Constants;
-using Hutopy.Infrastructure.AzureBlob;
+using Hutopy.Infrastructure.BlobStorage;
 using Hutopy.Infrastructure.Data;
 using Hutopy.Infrastructure.Identity;
 using Microsoft.AspNetCore.Identity;
@@ -49,9 +48,6 @@ public static class DependencyInjection
         // Scoped services
         services.AddScoped<IdentityService>();
         
-        services.AddAuthorization(options =>
-            options.AddPolicy(Policies.CanPurge, policy => policy.RequireRole(Roles.Administrator)));
-
         return services;
     }
 }