Removed Codepen adapter because it provides an oEmbed api now
Removed Codepen adapter because it provides an oEmbed api now

okatsuralau/Embed,zyuhel/Embed,Soullivaneuh/Embed,oscarotero/Embed,davereid/Embed,thenextweb/Embed,RJacksonm1/Embed,younes0/Embed,mburtscher/Embed,JanPetterMG/Embed,philrennie/Embed,daveross/Embed