chore: Remove obsolete blog posts and related files

Author: speier

website/blog/2019-05-28-first-blog-post.md

@@ -1,23 +1,7 @@
-yangshun:
-  name: Yangshun Tay
-  title: Front End Engineer @ Facebook
-  url: https://github.com/yangshun
-  image_url: https://github.com/yangshun.png
-  page: true
-  socials:
-    x: yangshunz
-    github: yangshun
-
-slorber:
-  name: Sébastien Lorber
-  title: Docusaurus maintainer
-  url: https://sebastienlorber.com
-  image_url: https://github.com/slorber.png
-  page:
-    # customize the url of the author page at /blog/authors/<permalink>
-    permalink: '/all-sebastien-lorber-articles'
-  socials:
-    x: sebastienlorber
-    linkedin: sebastienlorber
-    github: slorber
-    newsletter: https://thisweekinreact.com
+# Add Comet blog authors here
+# Example:
+# username:
+#   name: Full Name
+#   title: Role
+#   url: https://github.com/username
+#   image_url: https://github.com/username.png

website/blog/2019-05-29-long-blog-post.md

@@ -1,19 +1,6 @@
-facebook:
-  label: Facebook
-  permalink: /facebook
-  description: Facebook tag description
-
-hello:
-  label: Hello
-  permalink: /hello
-  description: Hello tag description
-
-docusaurus:
-  label: Docusaurus
-  permalink: /docusaurus
-  description: Docusaurus tag description
-
-hola:
-  label: Hola
-  permalink: /hola
-  description: Hola tag description
+# Add blog post tags here
+# Example:
+# tagname:
+#   label: Tag Name
+#   permalink: /tagname
+#   description: Tag description

website/blog/2021-08-01-mdx-blog-post.mdx

@@ -418,49 +418,3 @@ If a command fails partway through:
 This action is dangerous
 
 :::
-
-## MDX and React Components
-
-[MDX](https://mdxjs.com/) can make your documentation more **interactive** and allows using any **React components inside Markdown**:
-
-```jsx
-export const Highlight = ({children, color}) => (
-  <span
-    style={{
-      backgroundColor: color,
-      borderRadius: '20px',
-      color: '#fff',
-      padding: '10px',
-      cursor: 'pointer',
-    }}
-    onClick={() => {
-      alert(`You clicked the color ${color} with label ${children}`)
-    }}>
-    {children}
-  </span>
-);
-
-This is <Highlight color="#25c2a0">Docusaurus green</Highlight> !
-
-This is <Highlight color="#1877F2">Facebook blue</Highlight> !
-```
-
-export const Highlight = ({children, color}) => (
-  <span
-    style={{
-      backgroundColor: color,
-      borderRadius: '20px',
-      color: '#fff',
-      padding: '10px',
-      cursor: 'pointer',
-    }}
-    onClick={() => {
-      alert(`You clicked the color ${color} with label ${children}`);
-    }}>
-    {children}
-  </span>
-);
-
-This is <Highlight color="#25c2a0">Docusaurus green</Highlight> !
-
-This is <Highlight color="#1877F2">Facebook blue</Highlight> !