chore: Delete support hub (#5317)

## Description

Product was discontinued

## Steps for reproduction

1. click button
2. expect xyz

## Code Review

- [ ] hi @kof, I need you to do
  - conceptual review (architecture, feature-correctness)
  - detailed review (read every line)
  - test it on preview

## Before requesting a review

- [ ] made a self-review
- [ ] added inline comments where things may be not obvious (the "why",
not "what")

## Before merging

- [ ] tested locally and on preview environment (preview dev login:
0000)
- [ ] updated [test
cases](https://github.com/webstudio-is/webstudio/blob/main/apps/builder/docs/test-cases.md)
document
- [ ] added tests
- [ ] if any new env variables are added, added them to `.env` file

Author: kof

apps/builder/app/shared/help.tsx

@@ -6,12 +6,6 @@ import {
 } from "@webstudio-is/icons";
 
 export const help = [
-  {
-    label: "Support hub",
-    url: "https://help.webstudio.is/",
-    icon: <LifeBuoyIcon />,
-    target: "embed",
-  },
   {
     label: "Video tutorials",
     url: "https://wstd.us/101",