Add redirect and remove non-redirectable content

Author: dshevtsov

src/_includes/layout/header-styles.html

@@ -1,3 +1,2 @@
 <link rel="stylesheet" href="{{ site.baseurl }}/common/css/devdocs.css" />
-<link rel="alternate" type="application/rss+xml" title="Magento DevDocs RSS" href="/feed.xml" />
 <meta name="google-site-verification" content="3WFsoYwBe6UuxDwgs7bmd7t0YFQVzDpLpWLjNh0CUp8" />

src/contributor-guide/templates/tutorial-template-first.md

@@ -10,6 +10,7 @@ return_to:
 redirect_from:
 - guides/v2.3/contributor-guide/templates/tutorial-template-first.html
 - guides/v2.4/contributor-guide/templates/tutorial-template-first.html
+redirect_to: https://developer.adobe.com/commerce/contributor/guides/doc-contributions/
 ---
 
 A tutorial provides procedural information spread across multiple pages. It contains several design elements that differ from standard topics:

src/contributor-guide/templates/tutorial-template-last.md

@@ -10,6 +10,7 @@ return_to:
 redirect_from:
 - guides/v2.3/contributor-guide/templates/tutorial-template-last.html
 - guides/v2.4/contributor-guide/templates/tutorial-template-last.html
+redirect_to: https://developer.adobe.com/commerce/contributor/guides/doc-contributions/
 ---
 
 The last page of a tutorial should acknowledge the reader has completed the tutorial and provide links to related information. Otherwise, add the content as you see fit.

src/contributor-guide/templates/tutorial-template-middle.md

@@ -10,6 +10,7 @@ return_to:
 redirect_from:
 - guides/v2.3/contributor-guide/templates/tutorial-template-middle.html
 - guides/v2.4/contributor-guide/templates/tutorial-template-middle.html
+redirect_to: https://developer.adobe.com/commerce/contributor/guides/doc-contributions/
 ---
 
 Add the content for each step as you see fit.

src/feed.xml

@@ -1,6 +1,7 @@
 ---
 layout: full-width
 title: Magento Progressive Web Applications (PWA)
+redirect_to: https://developer.adobe.com/commerce/pwa-studio/
 ---
 
 ## What is a Progressive Web App

src/guides/v2.3/pwa/index.md

@@ -93,10 +93,6 @@ If you are integrating Magento entities such as variable and widget as plugins,
 
 **Example:** CKEditor/CKEditor4/view/base/web/ckeditor4Adapter.js
 
-{% collapsible Show file content %}
-{% include_relative code-samples/ckeditor4Adapter.md %}
-{% endcollapsible %}
-
 ## Step 4. Load editor library
 
 After loading, modifying, and merging all configurations, Magento serializes the result into a JSON object and passes it to the UI component.