remove references to disused RIOT.USER_NOT_FOUND error code

Author: germain-gg

src/utils/MultiInviter.js

@@ -164,7 +164,7 @@ export default class MultiInviter {
                         this._doInvite(address, ignoreProfile).then(resolve, reject);
                     }, 5000);
                     return;
-                } else if (['M_NOT_FOUND', 'M_USER_NOT_FOUND', 'RIOT.USER_NOT_FOUND'].includes(err.errcode)) {
+                } else if (['M_NOT_FOUND', 'M_USER_NOT_FOUND'].includes(err.errcode)) {
                     errorText = _t("User %(user_id)s does not exist", {user_id: address});
                 } else if (err.errcode === 'M_PROFILE_UNDISCLOSED') {
                     errorText = _t("User %(user_id)s may or may not exist", {user_id: address});
@@ -205,7 +205,7 @@ export default class MultiInviter {
             if (Object.keys(this.errors).length > 0 && !this.groupId) {
                 // There were problems inviting some people - see if we can invite them
                 // without caring if they exist or not.
-                const unknownProfileErrors = ['M_NOT_FOUND', 'M_USER_NOT_FOUND', 'M_PROFILE_UNDISCLOSED', 'M_PROFILE_NOT_FOUND', 'RIOT.USER_NOT_FOUND'];
+                const unknownProfileErrors = ['M_NOT_FOUND', 'M_USER_NOT_FOUND', 'M_PROFILE_UNDISCLOSED', 'M_PROFILE_NOT_FOUND'];
                 const unknownProfileUsers = Object.keys(this.errors).filter(a => unknownProfileErrors.includes(this.errors[a].errcode));
 
                 if (unknownProfileUsers.length > 0) {