chore(no-unused-class-name): removed premature 'since' comment

Author: marekdedic

docs/rules/no-unused-class-name.md

@@ -3,13 +3,14 @@ pageClass: "rule-details"
 sidebarDepth: 0
 title: "svelte/no-unused-class-name"
 description: "disallow the use of a class in the template without a corresponding style"
-since: "v2.16.0"
 ---
 
 # svelte/no-unused-class-name
 
 > disallow the use of a class in the template without a corresponding style
 
+- :exclamation: <badge text="This rule has not been released yet." vertical="middle" type="error"> **_This rule has not been released yet._** </badge>
+
 ## :book: Rule Details
 
 This rule is aimed at reducing unused classes in the HTML template. While `svelte-check` will produce the `css-unused-selector` if your `<style>` block includes any classes that aren't used in the template, this rule works the other way around - it reports cases wehre the template contains classes that aren't referred to in the `<style>` block.
@@ -54,10 +55,6 @@ This rule is aimed at reducing unused classes in the HTML template. While `svelt
 
 Nothing.
 
-## :rocket: Version
-
-This rule was introduced in eslint-plugin-svelte v2.16.0
-
 ## :mag: Implementation
 
 - [Rule source](https://github.com/sveltejs/eslint-plugin-svelte/blob/main/src/rules/no-unused-class-name.ts)