Revert "feat(docz): expose <Code /> component" (#1210)

This reverts commit c7a19b4.

Author: rakannimer

core/docz/src/index.ts

@@ -5,6 +5,3 @@ export { Props, PropsComponentProps } from './components/Props'
 export * from './hooks'
 export { theme } from './theme'
 export { doczState, Entry, MenuItem, ThemeConfig } from './state'
-
-const { Code } = require('gatsby-theme-docz/src/components/Code')
-export { Code }