remove spread syntax

frontend/src/components/Header.js

@@ -1,7 +1,9 @@
 import React, { Component, PropTypes } from 'react'
+import { objectWithoutProperties } from '../utils'
 
 const MapLink = props => {
-  const { show, linkText, href, linkClass, ...otherProps } = props
+  const { show, linkText, href, linkClass } = props
+  const otherProps = objectWithoutProperties(props, ['show', 'linkText', 'href', 'linkClass'])
   if (!show) {
     return null
   }

frontend/src/utils/index.js

@@ -0,0 +1,9 @@
+export const objectWithoutProperties = (obj, keys) => {
+  const target = {}
+  for (let i in obj) {
+    if (keys.indexOf(i) !== -1) continue
+    if (!Object.prototype.hasOwnProperty.call(obj, i)) continue
+    target[i] = obj[i]
+  }
+  return target
+}