refactor(devtools): remove unused SEO overview footnote and clean up README

This commit removes the unused 'seoOverviewFootnote' style and its corresponding JSX element from the SEO overview section. Additionally, it updates the README to streamline the description of checks included in the SEO tab, enhancing clarity and conciseness. These changes improve code maintainability and documentation accuracy.

Author: abedshaaban

packages/devtools/src/styles/use-styles.ts

@@ -771,11 +771,6 @@ const stylesFactory = (theme: DevtoolsStore['settings']['theme']) => {
       background: ${t(colors.gray[100], colors.gray[800] + '40')};
       color: ${t(colors.gray[600], '#9ca3af')};
     `,
-    seoOverviewFootnote: css`
-      margin-top: 8px;
-      font-size: 11px;
-      color: ${t(colors.gray[500], colors.gray[400])};
-    `,
     seoOverviewCheckListCaption: css`
       margin: 0 0 8px 0;
       font-size: 11px;

packages/devtools/src/tabs/seo-tab/README.md

@@ -163,8 +163,7 @@ Checks included:
 - Invalid URL format (`error`)
 - External `_blank` link without `noopener` (`warning`)
 - Unexpected protocol (`warning`)
-- External link without `nofollow` (`info`)
-- Hash, mailto, tel, and other non-web links (`info`)
+- mailto, tel, and other non-web links (`info`)
 
 ## Canonical, URL, Indexability & Follow
 
@@ -188,8 +187,4 @@ Checks included:
 - Page marked as `noindex` (`error`)
 - Page marked as `nofollow` (`warning`)
 - Missing robots directives (`info`)
-- URL query parameters present (`info`)
-
-Note:
-
-- `X-Robots-Tag` response headers are not reliably available from this in-page view.
+- URL query parameters present (`info`)

packages/devtools/src/tabs/seo-tab/seo-overview.tsx

@@ -280,9 +280,6 @@ export function SeoOverviewSection(props: { goTo: (view: SeoDetailView) => void
           label="Robots directives"
           value={bundle().canonical.robots.join(', ') || 'None'}
         />
-        <div class={styles().seoOverviewFootnote}>
-          X-Robots-Tag response headers are not available in this in-page view.
-        </div>
       </div>
 
       <Show when={bundle().canonical.issues.length > 0}>