remove merge2

Author: gregolsky

package-lock.json

@@ -76,7 +76,6 @@
     "bluebird": "^3.4.7",
     "change-case": "^3.0.2",
     "md5-hex": "^2.0.0",
-    "merge2": "^1.2.2",
     "moment": "^2.22.0",
     "pluralize": "^4.0.0",
     "qs": "^6.5.2",

package.json

@@ -1,4 +1,3 @@
-import * as merge2 from "merge2";
 import * as stream from "readable-stream";
 import * as promisify from "util.promisify";
 
@@ -29,7 +28,3 @@ export function stringToReadable(s: string) {
     result.push(null);
     return result;
 }
-
-export function concatStreams(...streams: stream.Stream[]): stream.Readable {
-    return merge2(...streams);
-}