feat: Support dark mode in login pages (#7420)

Co-authored-by: Sivin Varghese <64252451+iamsivin@users.noreply.github.com>

app/javascript/dashboard/helper/URLHelper.js

@@ -1,41 +1,8 @@
-import { DEFAULT_REDIRECT_URL } from 'dashboard/constants/globals';
-
 export const frontendURL = (path, params) => {
   const stringifiedParams = params ? `?${new URLSearchParams(params)}` : '';
   return `/app/${path}${stringifiedParams}`;
 };
 
-const getSSOAccountPath = ({ ssoAccountId, user }) => {
-  const { accounts = [], account_id = null } = user || {};
-  const ssoAccount = accounts.find(
-    account => account.id === Number(ssoAccountId)
-  );
-  let accountPath = '';
-  if (ssoAccount) {
-    accountPath = `accounts/${ssoAccountId}`;
-  } else if (accounts.length) {
-    // If the account id is not found, redirect to the first account
-    const accountId = account_id || accounts[0].id;
-    accountPath = `accounts/${accountId}`;
-  }
-  return accountPath;
-};
-
-export const getLoginRedirectURL = ({
-  ssoAccountId,
-  ssoConversationId,
-  user,
-}) => {
-  const accountPath = getSSOAccountPath({ ssoAccountId, user });
-  if (accountPath) {
-    if (ssoConversationId) {
-      return frontendURL(`${accountPath}/conversations/${ssoConversationId}`);
-    }
-    return frontendURL(`${accountPath}/dashboard`);
-  }
-  return DEFAULT_REDIRECT_URL;
-};
-
 export const conversationUrl = ({
   accountId,
   activeInbox,