Revert "feat(avatars): use initials service for getting images (#2312)"

There is more avatar work coming down the line for mobile,
which should also affect web, assuming the same getAvatarURL
helper will be used. As such, instead of continuing to
support the initials service and tweaking UI, revert to
make way for the future avatar work.

This reverts commit 2ea5ad68a5.

react/features/base/participants/functions.js

  * @returns {string} The URL of the image for the avatar of the specified
  * participant.
  */
-export function getAvatarURL({ avatarID, avatarURL, email, id, name }: {
+export function getAvatarURL({ avatarID, avatarURL, email, id }: {
         avatarID: string,
         avatarURL: string,
         email: string,
-        id: string,
-        name: string
+        id: string
 }) {
     // If disableThirdPartyRequests disables third-party avatar services, we are
     // restricted to a stock image of ours.
         if (urlPrefix) {
             urlSuffix = interfaceConfig.RANDOM_AVATAR_URL_SUFFIX;
         } else {
-            urlPrefix = 'https://avatar-cdn.jitsi.net/';
-            urlSuffix = `/${_getInitials(name) || ' '}/200/avatar.png`;
+            // Otherwise, use a default (meeples, of course).
+            urlPrefix = 'https://abotars.jitsi.net/meeple/';
+            urlSuffix = '';
         }
     }
 
             ? stateful
             : toState(stateful)['features/base/participants'] || []);
 }
-
-/**
- * Gets the initials from a name, assuming a westernized name.
- *
- * @param {string} name - The name from which to parse initials.
- * @private
- * @returns {string}
- */
-function _getInitials(name) {
-    if (!name) {
-        return '';
-    }
-
-    const nameParts = name.toUpperCase().split(' ');
-    const firstName = nameParts[0];
-    let initials = firstName[0];
-
-    if (nameParts.length > 1) {
-        initials += nameParts[nameParts.length - 1];
-    }
-
-    return initials;
-}