timezone is already determined automatically using activation

src/config.js

@@ -23,8 +23,6 @@ exports = module.exports = {
     isCustomDomain: isCustomDomain,
     database: database,
 
-    defaultTimezone: defaultTimezone,
-
     // these values are derived
     adminOrigin: adminOrigin,
     internalAdminOrigin: internalAdminOrigin,
@@ -85,7 +83,6 @@ function initConfig() {
         secretAccessKey: null   // selfhosting only
     };
     data.dnsInSync = false;
-    data.timezone = 'America/Los_Angeles';
 
     if (exports.CLOUDRON) {
         data.port = 3000;
@@ -205,7 +202,3 @@ function backupKey() {
 function aws() {
     return get('aws');
 }
-
-function defaultTimezone() {
-    return get('timezone');
-}