diff --git a/src/components/seo.js b/src/components/seo.js
deleted file mode 100644
index 1bc3cfe..0000000
--- a/src/components/seo.js
+++ /dev/null
@@ -1,88 +0,0 @@
-/**
- * SEO component that queries for data with
- *  Gatsby's useStaticQuery React hook
- *
- * See: https://www.gatsbyjs.org/docs/use-static-query/
- */
-
-import React from 'react'
-import PropTypes from 'prop-types'
-import { Helmet } from 'react-helmet'
-import { useStaticQuery, graphql } from 'gatsby'
-
-function SEO ({ description, lang, meta, title }) {
-  const { site } = useStaticQuery(
-    graphql`
-      query {
-        site {
-          siteMetadata {
-            title
-            description
-            author
-          }
-        }
-      }
-    `
-  )
-
-  const metaDescription = description || site.siteMetadata.description
-
-  return (
-    <Helmet
-      htmlAttributes={{
-        lang
-      }}
-      title={title}
-      titleTemplate={`%s | ${site.siteMetadata.title}`}
-      meta={[
-        {
-          name: 'description',
-          content: metaDescription
-        },
-        {
-          property: 'og:title',
-          content: title
-        },
-        {
-          property: 'og:description',
-          content: metaDescription
-        },
-        {
-          property: 'og:type',
-          content: 'website'
-        },
-        {
-          name: 'twitter:card',
-          content: 'summary'
-        },
-        {
-          name: 'twitter:creator',
-          content: site.siteMetadata.author
-        },
-        {
-          name: 'twitter:title',
-          content: title
-        },
-        {
-          name: 'twitter:description',
-          content: metaDescription
-        }
-      ].concat(meta)}
-    />
-  )
-}
-
-SEO.defaultProps = {
-  lang: 'en',
-  meta: [],
-  description: ''
-}
-
-SEO.propTypes = {
-  description: PropTypes.string,
-  lang: PropTypes.string,
-  meta: PropTypes.arrayOf(PropTypes.object),
-  title: PropTypes.string.isRequired
-}
-
-export default SEO
diff --git a/src/pages/404.js b/src/pages/404.js
index 30df068..733d5c3 100644
--- a/src/pages/404.js
+++ b/src/pages/404.js
@@ -1,11 +1,9 @@
 import React from 'react'
 
 import Layout from '../components/layout'
-import Seo from '../components/seo'
 
 const NotFoundPage = () => (
   <Layout>
-    <Seo title='404: Not found' />
     <h1>NOT FOUND</h1>
     <p>You just hit a route that doesn&#39;t exist... the sadness.</p>
   </Layout>
diff --git a/src/pages/page-2.js b/src/pages/page-2.js
deleted file mode 100644
index 55eda8b..0000000
--- a/src/pages/page-2.js
+++ /dev/null
@@ -1,16 +0,0 @@
-import React from 'react'
-import { Link } from 'gatsby'
-
-import Layout from '../components/layout'
-import Seo from '../components/seo'
-
-const SecondPage = () => (
-  <Layout>
-    <Seo title='Page two' />
-    <h1>Hi from the second page</h1>
-    <p>Welcome to page 2</p>
-    <Link to='/'>Go back to the homepage</Link>
-  </Layout>
-)
-
-export default SecondPage
diff --git a/src/pages/using-typescript.tsx b/src/pages/using-typescript.tsx
deleted file mode 100644
index f9212ca..0000000
--- a/src/pages/using-typescript.tsx
+++ /dev/null
@@ -1,34 +0,0 @@
-// If you don't want to use TypeScript you can delete this file!
-import React from "react"
-import { PageProps, Link, graphql } from "gatsby"
-
-import Layout from "../components/layout"
-import SEO from "../components/seo"
-
-type DataProps = {
-  site: {
-    buildTime: string
-  }
-}
-
-const UsingTypescript: React.FC<PageProps<DataProps>> = ({ data, path }) => (
-  <Layout>
-    <SEO title="Using TypeScript" />
-    <h1>Gatsby supports TypeScript by default!</h1>
-    <p>This means that you can create and write <em>.ts/.tsx</em> files for your pages, components etc. Please note that the <em>gatsby-*.js</em> files (like gatsby-node.js) currently don't support TypeScript yet.</p>
-    <p>For type checking you'll want to install <em>typescript</em> via npm and run <em>tsc --init</em> to create a <em>.tsconfig</em> file.</p>
-    <p>You're currently on the page "{path}" which was built on {data.site.buildTime}.</p>
-    <p>To learn more, head over to our <a href="https://www.gatsbyjs.org/docs/typescript/">documentation about TypeScript</a>.</p>
-    <Link to="/">Go back to the homepage</Link>
-  </Layout>
-)
-
-export default UsingTypescript
-
-export const query = graphql`
-  {
-    site {
-      buildTime(formatString: "YYYY-MM-DD hh:mm a z")
-    }
-  }
-`