set entitlement to false on reg if none

GitOrigin-RevId: 039189699f78cbaa5917cfadb7d3bedd599c6396

services/web/app/src/Features/User/SAMLIdentityManager.js

@@ -171,6 +171,8 @@ async function linkAccounts(
   // update v1 affiliations record
   if (hasEntitlement) {
     await InstitutionsAPI.promises.addEntitlement(userId, institutionEmail)
+  } else {
+    await InstitutionsAPI.promises.removeEntitlement(userId, institutionEmail)
   }
 }