remove attrMapUsername from mandatoryConfigKeysForSaml

packages/app/src/server/service/passport.ts

@@ -94,7 +94,6 @@ class PassportService implements S2sMessageHandlable {
     'security:passport-saml:issuer',
     'security:passport-saml:cert',
     'security:passport-saml:attrMapId',
-    'security:passport-saml:attrMapUsername',
     'security:passport-saml:attrMapMail',
   ];