server parseHttpRequest(): simplify info_hash checking

Author: astro

lib/parse_http.js

@@ -44,12 +44,10 @@ function parseHttpRequest (req, options) {
     if (params.info_hash) {
       if (!Array.isArray(params.info_hash)) throw new Error('invalid info_hash array')
 
-      params.info_hash = params.info_hash.map(function (infoHash) {
+      params.info_hash.forEach(function (infoHash) {
         if (infoHash.length !== 20) {
           throw new Error('invalid info_hash')
         }
-
-        return infoHash
       })
     }