chore(api-server): remove unused `is*` fields (#50346)

api-server/src/common/models/user.js

@@ -815,10 +815,6 @@ export default function initializeUser(User) {
           user;
         const allUser = {
           ..._.pick(user, publicUserProps),
-          isGithub: !!user.githubProfile,
-          isLinkedIn: !!user.linkedin,
-          isTwitter: !!user.twitter,
-          isWebsite: !!user.website,
           points: progressTimestamps.length,
           completedChallenges,
           ...getProgress(progressTimestamps, timezone),

api-server/src/server/boot/settings.js

@@ -307,16 +307,7 @@ function handleInvalidUpdate(res) {
 
 function updateUserFlag(req, res, next) {
   const { user, body: update } = req;
-  const allowedKeys = [
-    'isGithub',
-    'isLinkedIn',
-    'isTwitter',
-    'isWebsite',
-    'githubProfile',
-    'linkedin',
-    'twitter',
-    'website'
-  ];
+  const allowedKeys = ['githubProfile', 'linkedin', 'twitter', 'website'];
   if (Object.keys(update).every(key => allowedKeys.includes(key))) {
     return user.updateAttributes(
       update,

api-server/src/server/boot/user.js

@@ -149,10 +149,6 @@ function createReadSessionUser(app) {
             ...pick(user, userPropsForSession),
             username: user.usernameDisplay || user.username,
             isEmailVerified: !!user.emailVerified,
-            isGithub: !!user.githubProfile,
-            isLinkedIn: !!user.linkedin,
-            isTwitter: !!user.twitter,
-            isWebsite: !!user.website,
             ...normaliseUserFields(user),
             joinDate: user.id.getTimestamp(),
             userToken: encodedUserToken