Remove old way to handle meta tags

lib/core/meta.old.js

@@ -1,74 +0,0 @@
-
-import { attrsStr } from 'utils'
-import LRU from 'lru-cache'
-
-export default class MetaRenderer {
-  constructor (nuxt, renderer) {
-    this.nuxt = nuxt
-    this.renderer = renderer
-    this.options = nuxt.options
-    this.cache = LRU({})
-  }
-
-  render ({ url = '/' }) {
-    let head = this.cache.get(url)
-
-    if (head) {
-      return head
-    }
-
-    head = ''
-
-    // Title
-    if (typeof this.options.head.title === 'string') {
-      head += `<title data-n-head="true">${this.options.head.title || ''}</title>`
-    }
-
-    // Meta
-    if (Array.isArray(this.options.head.meta)) {
-      this.options.head.meta.forEach(meta => {
-        head += `<meta data-n-head="true" ${attrsStr(meta)}/>`
-      })
-    }
-
-    // Links
-    if (Array.isArray(this.options.head.link)) {
-      this.options.head.link.forEach(link => {
-        head += `<link data-n-head="true" ${attrsStr(link)}/>`
-      })
-    }
-
-    // Style
-    if (Array.isArray(this.options.head.style)) {
-      this.options.head.style.forEach(style => {
-        head += `<style data-n-head="true" ${attrsStr(style, ['cssText'])}>${style.cssText || ''}</style>`
-      })
-    }
-
-    // Script
-    if (Array.isArray(this.options.head.script)) {
-      this.options.head.script.forEach(script => {
-        head += `<script data-n-head="true" ${attrsStr(script, ['innerHTML'])}>${script.innerHTML || ''}</script>`
-      })
-    }
-
-    // Resource Hints
-    const clientManifest = this.renderer.resources.clientManifest
-    if (this.options.render.resourceHints && clientManifest) {
-      const publicPath = clientManifest.publicPath || '/_nuxt/'
-      // Pre-Load initial resources
-      if (Array.isArray(clientManifest.initial)) {
-        head += clientManifest.initial.map(r => `<link rel="preload" href="${publicPath}${r}" as="script" />`).join('')
-      }
-
-      // Pre-Fetch async resources
-      if (Array.isArray(clientManifest.async)) {
-        head += clientManifest.async.map(r => `<link rel="prefetch" href="${publicPath}${r}" />`).join('')
-      }
-    }
-
-    this.cache.set(url, head)
-
-    return head
-  }
-}