Address issues pointed out by automated review.

Author: scraswell

lib/rest-client.js

@@ -133,17 +133,16 @@ module.exports = CoreObject.extend({
         return Promise.reject(new Error(errorMessage));
       }
 
-      var responseBody =
-        useReleaseEndpoint && isSummaryEndpoint ? response.body.filter((rev) => rev.app === appName) : response.body;
-
-      // Validate that responseBody is an array
-      if (!Array.isArray(responseBody)) {
-        var bodyType = responseBody === null ? 'null' : typeof responseBody;
+      if (!Array.isArray(response.body)) {
+        var bodyType = response.body === null ? 'null' : typeof response.body;
         return Promise.reject(
-          new Error('Expected array of revisions, but got ' + bodyType + ': ' + JSON.stringify(responseBody)),
+          new Error('Expected array of revisions, but got ' + bodyType + ': ' + JSON.stringify(response.body)),
         );
       }
 
+      var responseBody =
+        useReleaseEndpoint && isSummaryEndpoint ? response.body.filter((rev) => rev.app === appName) : response.body;
+
       return responseBody.map(function (revision) {
         // ember-cli-deploy-display-revisions expects the timestamp to be either
         // a JS Date object or the number of milliseconds since 1970-01-01T00:00:00