Core/Auth: Reverted part of fb43a92cc2 - session key is still needed after logging in to be able to switch realms

sql/base/auth_database.sql

@@ -26,7 +26,7 @@ CREATE TABLE `account` (
   `id` int(10) unsigned NOT NULL AUTO_INCREMENT COMMENT 'Identifier',
   `username` varchar(32) NOT NULL DEFAULT '',
   `sha_pass_hash` varchar(40) NOT NULL DEFAULT '',
-  `sessionkey` varchar(80) NOT NULL DEFAULT '' COMMENT 'Temporary storage of session key used to pass data from authserver to worldserver',
+  `sessionkey` varchar(80) NOT NULL DEFAULT '',
   `v` varchar(64) NOT NULL DEFAULT '',
   `s` varchar(64) NOT NULL DEFAULT '',
   `email` varchar(254) NOT NULL DEFAULT '',