index: Remove `Loading...` text from the app loading overlay.

The new loading spinner animation conveys the message well
that the app is loading and this text is no longer required.

templates/zerver/app/index.html

@@ -79,9 +79,6 @@
     border-top-color: hsl(0,0%,52%);
     animation: zspinner 1s linear infinite;
     }
-    .app-loading-text {
-    font-weight: normal;
-    }
 </style>
 {% endblock %}
 
@@ -95,7 +92,6 @@
             <div class="app-loading-spinner"></div>
             <svg class="app-loading-logo" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 773.12 773.12"><linearGradient id="a" x1="0" y1="0" x2="0" y2="1"><stop offset="0" stop-color="#50adff"/><stop offset="1" stop-color="#7877fc"/></linearGradient><circle cx="386.56" cy="386.56" r="386.56" fill="url(#a)"/><path d="M566.66 527.25c0 33.03-24.23 60.05-53.84 60.05H260.29c-29.61 0-53.84-27.02-53.84-60.05 0-20.22 9.09-38.2 22.93-49.09l134.37-120c2.5-2.14 5.74 1.31 3.94 4.19l-49.29 98.69c-1.38 2.76.41 6.16 3.25 6.16h191.18c29.61 0 53.83 27.03 53.83 60.05zm0-281.39c0 20.22-9.09 38.2-22.93 49.09l-134.37 120c-2.5 2.14-5.74-1.31-3.94-4.19l49.29-98.69c1.38-2.76-.41-6.16-3.25-6.16H260.29c-29.61 0-53.84-27.02-53.84-60.05s24.23-60.05 53.84-60.05h252.54c29.61 0 53.83 27.02 53.83 60.05z" fill="#fff"/></svg>
         </div>
-        <h3 class="app-loading-text">{{ _('Loading...') }}</h3>
     </div>
     <div id="app-loading-bottom-content">
         <p>{% trans %}If this message does not go away, try <a id="reload-lnk">reloading</a> the page.{% endtrans %}</p>

zerver/tests/test_home.py

@@ -227,7 +227,7 @@ class HomeTest(ZulipTestCase):
         # Keep this list sorted!!!
         html_bits = [
             "message_feed_errors_container",
-            "Loading...",
+            "app-loading-logo",
             # Verify that the app styles get included
             "app-stubentry.js",
             "data-params",