Cleaned up nftCard labs flag

refs https://github.com/TryGhost/Team/issues/1258

- removed labs flag and conditionals

ghost/admin/app/services/feature.js

@@ -56,7 +56,6 @@ export default Service.extend({
     mediaAPI: feature('mediaAPI'),
     filesAPI: feature('filesAPI'),
     calloutCard: feature('calloutCard'),
-    nftCard: feature('nftCard'),
     accordionCard: feature('accordionCard'),
     fileCard: feature('fileCard'),
     audioCard: feature('audioCard'),

ghost/admin/app/templates/settings/labs.hbs

@@ -339,19 +339,6 @@
                         </div>
                     </div>
                 </div>
-                <div class="gh-expandable-block">
-                    <div class="gh-expandable-header">
-                        <div>
-                            <h4 class="gh-expandable-title">Cardmageddon - NFT (Opensea embed)</h4>
-                            <p class="gh-expandable-description">
-                                Embed NFT cards directly in post content
-                            </p>
-                        </div>
-                        <div class="for-switch">
-                           <GhFeatureFlag @flag="nftCard" />
-                        </div>
-                    </div>
-                </div>
                 <div class="gh-expandable-block">
                     <div class="gh-expandable-header">
                         <div>

ghost/admin/lib/koenig-editor/addon/options/cards.js

@@ -350,8 +350,7 @@ export const CARD_MENU = [
             matches: ['nft', 'opensea'],
             type: 'card',
             replaceArg: 'embed',
-            params: ['url'],
-            isAvailable: 'feature.nftCard'
+            params: ['url']
         },
         {
             label: 'Other...',