Revert "Merge branch 'master' of https://github.com/discourse/discourse"

This reverts commit e62a85cf6f, reversing
changes made to 2660c2e21d.

lib/post_creator.rb

@@ -374,10 +374,6 @@ class PostCreator
   # discourse post.
   def create_embedded_topic
     return unless @opts[:embed_url].present?
-
-    original_uri = URI.parse(@opts[:embed_url])
-    raise Discourse::InvalidParameters.new(:embed_url) unless original_uri.is_a?(URI::HTTP)
-
     embed = TopicEmbed.new(topic_id: @post.topic_id, post_id: @post.id, embed_url: @opts[:embed_url])
     rollback_from_errors!(embed) unless embed.save
   end