refact: rename Column components to be generic

src/components/Footer/index.tsx

@@ -1,19 +0,0 @@
-import React, { FC } from "react"
-import packageJson from "../../../package.json"
-import { Container } from "../Container"
-import * as SC from "./styles"
-
-export const Footer: FC = () => {
-  return (
-    <SC.FooterWrapper>
-      <Container>
-        <p>
-          © {new Date().getFullYear()}, Built with
-          {` `}
-          <a href="https://www.gatsbyjs.org">Gatsby</a> - Source on{" "}
-          <a href={packageJson.repository.url}>GitHub</a>
-        </p>
-      </Container>
-    </SC.FooterWrapper>
-  )
-}