remove EmberData from intro blurb since its not releasing

Author: jaredgalanis

content/ember-released-5-4.md

@@ -9,7 +9,7 @@ tags:
   - version-5-x
 ---
 
-Today the Ember project is releasing version 5.4 of Ember.js, EmberData, and Ember CLI. <!-- Block start: Uncomment if an LTS candidate --><!--This release of Ember.js is an LTS (Long Term Support) candidate. LTS candidates prioritize stability over the addition of new features, and have an extended support schedule.--><!-- Block end -->
+Today the Ember project is releasing version 5.4 of Ember.js and Ember CLI. <!-- Block start: Uncomment if an LTS candidate --><!--This release of Ember.js is an LTS (Long Term Support) candidate. LTS candidates prioritize stability over the addition of new features, and have an extended support schedule.--><!-- Block end -->
 
 This release kicks off the 5.5 beta cycle for all sub-projects. We encourage our community (especially addon authors) to help test these beta builds and report any bugs before they are published as a final release in six weeks' time. The [ember-try](https://github.com/ember-cli/ember-try) addon is a great way to continuously test your projects against the latest Ember releases.