refactor(blog): remove i18n controls from page title component

Remove BlogI18nControls and related blog locale logic from
StarlightPageTitle.astro, cleaning up unused imports and conditional
rendering of the blog language switcher.

Co-Authored-By: Hagicode <noreply@hagicode.com>
Signed-off-by: newbe36524 <newbe36524@qq.com>

Author: newbe36524

src/components/StarlightPageTitle.astro

@@ -1,23 +1,13 @@
 ---
 import DocsEditLink from "./DocsEditLink.astro";
-import BlogI18nControls from "./BlogI18nControls.astro";
-import { stripBlogLocalePrefix } from "../lib/blog-i18n";
 
 const PAGE_TITLE_ID = "_top";
-const route = Astro.locals.starlightRoute;
-const routeLocale = route.locale ?? "root";
-const normalizedId = stripBlogLocalePrefix(`/${route.id}`).replace(/^\/+/, "");
-const blogPostMatch = normalizedId.match(/^blog\/(\d{4}-\d{2}-\d{2}-[^/]+)$/);
-const isBlogIndex = normalizedId === "blog";
 ---
 
 <div class="docs-page-title">
   <h1 id={PAGE_TITLE_ID}>{Astro.locals.starlightRoute.entry.data.title}</h1>
   <DocsEditLink placement="header" />
 </div>
-{(isBlogIndex || blogPostMatch) && (
-  <BlogI18nControls routeLocale={routeLocale} slug={blogPostMatch?.[1]} />
-)}
 
 <style>
   @layer starlight.core {