Remove HTTP Referer header config

Last bit of #930

Author: isaacs

lib/npm.js

@@ -103,8 +103,6 @@
     return littleGuys.indexOf(c) === -1
   })
 
-  var registryRefer
-
   Object.keys(abbrevs).concat(plumbing).forEach(function addCommand (c) {
     Object.defineProperty(npm.commands, c, { get: function () {
       if (!loaded) {
@@ -140,22 +138,6 @@
           }
         })
 
-        if (!registryRefer) {
-          registryRefer = [a].concat(args[0]).map(function (arg) {
-            // exclude anything that might be a URL, path, or private module
-            // Those things will always have a slash in them somewhere
-            if (arg && arg.match && arg.match(/\/|\\/)) {
-              return '[REDACTED]'
-            } else {
-              return arg
-            }
-          }).filter(function (arg) {
-            return arg && arg.match
-          }).join(' ')
-          npm.referer = registryRefer
-          npm.config.set('refer', npm.referer)
-        }
-
         cmd.apply(npm, args)
       }