Revert "Cache titles to reduce title requests. #2327"

This reverts commit 5c6e8e15bd368ab522749df0ca00d9296384dc5f.

src/Linkification/Embedding.coffee

@@ -20,8 +20,6 @@ Embedding =
         for key, service of Embedding.types when service.title?.batchSize
           Embedding.flushTitles service.title
         return
-      @cache.init Conf['cachedTitles']
-      $.sync 'cachedTitles', @cache.sync
 
   events: (post) ->
     return if g.VIEW is 'archive'
@@ -108,9 +106,7 @@ Embedding =
     {key, uid, options, link, post} = data
     return if not (service = Embedding.types[key].title)
     $.addClass link, key.toLowerCase()
-    if (text = Embedding.cache.get data)
+    if service.batchSize
-      Embedding.cb.titleText text, data
-    else if service.batchSize
       (service.queue or= []).push data
       if service.queue.length >= service.batchSize
         Embedding.flushTitles service
@@ -126,38 +122,6 @@ Embedding =
       return
     CrossOrigin.cache service.api(data.uid for data in queue), cb
 
-  cache: do ->
-    titles = $.dict()
-    newEntries = []
-    init = (data) ->
-      try
-        for {key, uid, text} in data
-          titles["#{key}.#{uid}"] = text
-        return
-    sync = (data) ->
-      try
-        for {key, uid, text} in data
-          k = "#{key}.#{uid}"
-          break if k of titles
-          titles[k] = text
-        return
-    get = ({key, uid}) ->
-      titles["#{key}.#{uid}"]
-    set = ({key, uid}, text) ->
-      titles["#{key}.#{uid}"] = text
-      newEntries.push {key, uid, text}
-      save()
-    save = $.debounce 2 * $.SECOND, ->
-      $.get 'cachedTitles', Conf['cachedTitles'], ({cachedTitles}) ->
-        sync cachedTitles
-        try
-          cachedTitles = newEntries.concat(cachedTitles)[-100..]
-        catch
-          cachedTitles = newEntries
-        newEntries = []
-        $.set 'cachedTitles', cachedTitles
-    {init, sync, get, set, save}
-
   preview: (data) ->
     {key, uid, link} = data
     return if not (service = Embedding.types[key].preview)
@@ -215,28 +179,25 @@ Embedding =
     title: (req, data) ->
       return unless req.status
 
-      {key, uid} = data
+      {key, uid, options, link, post} = data
       {status} = req
       service = Embedding.types[key].title
 
-      switch status
+      text = "[#{key}] #{switch status
         when 200, 304
           text = service.text req.response, uid
           if typeof text is 'string'
-            Embedding.cache.set data, text
+            text
           else
             text = link.textContent
         when 404
-          text = "Not Found"
+          "Not Found"
         when 403
-          text = "Forbidden or Private"
+          "Forbidden or Private"
         else
-          text = "#{status}'d"
+          "#{status}'d"
-      Embedding.cb.titleText text, data
+      }"
 
-    titleText: (text, data) ->
-      {key, link, post} = data
-      text = "[#{key}] #{text}"
       link.dataset.original = link.textContent
       link.textContent = text
       for post2 in post.clones

src/config/Config.coffee

@@ -1176,8 +1176,6 @@ Config =
 
   knownBanners: '<%= readJSON("banners.json").join(",") %>'
 
-  cachedTitles: [[]]
-
   passMessageClosed: false
 
   'Prerequest Captcha': false