Removed usage of removed TeamStore method (#4785)

webapp/stores/team_store.jsx

@@ -281,6 +281,20 @@ class TeamStoreClass extends EventEmitter {
         return this.teamListings;
     }
 
+    isTeamAdminForAnyTeam() {
+        if (!Utils) {
+            Utils = require('utils/utils.jsx'); //eslint-disable-line global-require
+        }
+
+        for (const teamMember of this.getMyTeamMembers()) {
+            if (Utils.isAdmin(teamMember.roles)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
     isTeamAdminForCurrentTeam() {
         return this.isTeamAdmin(UserStore.getCurrentId(), this.getCurrentId());
     }

webapp/utils/utils.jsx

@@ -1203,10 +1203,8 @@ export function canCreateCustomEmoji(user) {
         return false;
     } else if (window.mm_config.RestrictCustomEmojiCreation === 'admin') {
         // check whether the user is an admin on any of their teams
-        for (const member of TeamStore.getTeamMembers()) {
-            if (isAdmin(member.roles)) {
-                return true;
-            }
+        if (TeamStore.isTeamAdminForAnyTeam()) {
+            return true;
         }
 
         return false;