title: SvelteKit Unused CSS selector warning in vscode
body: <p>Hello i have annoying issue. How can i remove VS Code Unused CSS selector warning. This warning is in all files where i use . I know that i don't use .btn class in some components, but i want this class as global css.
  <a href="https://i.stack.imgur.com/YX2Dd.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/YX2Dd.png" alt="enter image description here" /></a></p>
  <p>my svelte.config.js:</p>
  <pre class="lang-js prettyprint-override"><code>const config = {
      onwarn: (warning, handler) =&gt; {
          const { code, frame } = warning;
          if (code === &quot;css-unused-selector&quot;)
                  return;
  
          handler(warning);
      },
      preprocess: [
          preprocess({
              defaults: {
                  style: 'scss'
              },
              postcss: true,
              scss: {
                  prependData: `@import 'src/scss/global.scss';`
              }
          })
      ],
  };
  </code></pre>
  <p>Please can someone help me?</p>