diff --git a/src/Identity/Models/Response/Accounts/RegisterFinishResponseModel.cs b/src/Identity/Models/Response/Accounts/RegisterFinishResponseModel.cs
index 564150ab30e0..b4c09a2879fe 100644
--- a/src/Identity/Models/Response/Accounts/RegisterFinishResponseModel.cs
+++ b/src/Identity/Models/Response/Accounts/RegisterFinishResponseModel.cs
@@ -5,13 +5,5 @@ namespace Bit.Identity.Models.Response.Accounts;
 public class RegisterFinishResponseModel : ResponseModel
 {
     public RegisterFinishResponseModel()
-        : base("registerFinish")
-    {
-        // We are setting this to an empty string so that old mobile clients don't break, as they reqiure a non-null value.
-        // This will be cleaned up in https://bitwarden.atlassian.net/browse/PM-21720.
-        CaptchaBypassToken = string.Empty;
-    }
-
-    public string CaptchaBypassToken { get; set; }
-
+        : base("registerFinish") { }
 }