removed unnecessary async keyword from validators

src/validators/neft.validator.js

@@ -1,4 +1,4 @@
-const neftValidator = async (req, res, next) => {
+const neftValidator = (req, res, next) => {
   const {
     fromAccount,
     toAccount,

src/validators/transfer.validator.js

@@ -1,4 +1,4 @@
-const transferValidator = async (req, res, next) => {
+const transferValidator = (req, res, next) => {
   const { fromAccount, toAccount, toAccountType, amount } = req.body;
 
   const accountTypes = ['SB', 'LN', 'Savings', 'Current'];