chore: clean up after removing netlify deploys (#56)

This cleans up any references to the Netlify deploy URL that
this project had been using for deploy previews.

Author: pfulton

README.md

@@ -1,7 +1,5 @@
 <div align="right">
 
-[![Netlify](https://api.netlify.com/api/v1/badges/22568c1e-135b-4cc4-a682-387cbad68a5d/deploy-status)](https://app.netlify.com/sites/spectrum-workflow-icons/deploys)
-
 ![GitHub Actions build status on main](https://img.shields.io/github/actions/workflow/status/adobe/spectrum-css-workflow-icons/build.yml?branch=main&style=for-the-badge&label=main)
 
 </div>

_data/metadata.js

@@ -2,7 +2,6 @@ const manifest = require('../icons/manifest.json') ?? {};
 
 module.exports = {
     title: 'Adobe Spectrum Workflow Icons',
-    url: 'https://spectrum-workflow-icons.netlify.app',
     description: 'This is a collection of open-source workflow icons for Adobe\'s Spectrum Design System. Spectrum uses Workflow and UI icons that are designed to be clear, minimal, and consistent across all platforms. Review the <a href="https://spectrum.adobe.com/page/iconography">Iconography guidelines</a> to understand how to use our icons.',
     language: 'en-US',
     icons: manifest.svg ?? [],