(core) Removing warnings about deprecated shortcuts.

Summary:
Warnings about deprecated shortcuts are no longer needed.
As a side effect it fixes a bug that caused those warnings to not persist its
state on pages with charts.

Test Plan: Removed

Reviewers: georgegevoian

Reviewed By: georgegevoian

Differential Revision: https://phab.getgrist.com/D3820

app/server/lib/FlexServer.ts

@@ -5,7 +5,6 @@ import {encodeUrl, getSlugIfNeeded, GristLoadConfig, IGristUrlState, isOrgInPath
         parseSubdomain, sanitizePathTail} from 'app/common/gristUrls';
 import {getOrgUrlInfo} from 'app/common/gristUrls';
 import {UserProfile} from 'app/common/LoginSessionAPI';
-import {DeprecationWarning} from 'app/common/Prefs';
 import {tbind} from 'app/common/tbind';
 import * as version from 'app/common/version';
 import {ApiServer} from 'app/gen-server/ApiServer';
@@ -826,9 +825,7 @@ export class FlexServer implements GristServer {
           // Note that the updateOrg() method handles all levels of prefs (for user, user+org, or org).
           await this._dbManager.updateOrg(getScope(req), 0, {userPrefs: {
             showNewUserQuestions: true,
-            recordSignUpEvent: true,
-            // Mark all deprecated warnings as seen.
-            seenDeprecatedWarnings: DeprecationWarning.values
+            recordSignUpEvent: true
           }});
 
           const domain = mreq.org ?? null;