chore: removed code injections in legacy folder

src/legacy/router.js

@@ -8,6 +8,13 @@ const lodash = require('lodash');
 const fs = require('fs');
 const path = require('path');
 const { PlatformError, getErrorRespEvents } = require('@rudderstack/integrations-lib');
+const {
+  getDestTransformHandler,
+  getDestFileUploadHandler,
+  getJobStatusHandler,
+  getPollStatusHandler,
+  getDeletionUserHandler,
+} = require('../util/fetchDestinationHandlers');
 const logger = require('../logger');
 const stats = require('../util/stats');
 const { SUPPORTED_VERSIONS, API_VERSION } = require('../routes/utils/constants');
@@ -61,22 +68,11 @@ const PAYLOAD_PROC_ERR_MSG = 'Error occurred while processing payload';
  */
 const getDestHandler = (version, dest) => {
   if (Object.prototype.hasOwnProperty.call(DestHandlerMap, dest)) {
-    return require(`../${version}/destinations/${DestHandlerMap[dest]}/transform`);
+    return getDestTransformHandler(version, DestHandlerMap[dest]);
   }
-  return require(`../${version}/destinations/${dest}/transform`);
+  return getDestTransformHandler(version, dest);
 };
 
-const getDestFileUploadHandler = (version, dest) =>
-  require(`../${version}/destinations/${dest}/fileUpload`);
-
-const getPollStatusHandler = (version, dest) => require(`../${version}/destinations/${dest}/poll`);
-
-const getJobStatusHandler = (version, dest) =>
-  require(`../${version}/destinations/${dest}/fetchJobStatus`);
-
-const getDeletionUserHandler = (version, dest) =>
-  require(`../${version}/destinations/${dest}/deleteUsers`);
-
 const getSourceHandler = (version, source) => require(`../${version}/sources/${source}/transform`);
 
 let areFunctionsEnabled = -1;