Tweak fetchBuckets to comply with the changes made to the routes (#5592)

This commit removes the argument in the fetchBuckets function that was
introduced in #5580. Due to the adjustment made in #5584, we no longer
need to differentiate between where the function has been called from.

browser/app/js/buckets/BucketList.js

@@ -28,7 +28,7 @@ export class BucketList extends React.Component {
   componentWillMount() {
     const { fetchBuckets, setBucketList, selectBucket } = this.props
     if (web.LoggedIn()) {
-      fetchBuckets("list")
+      fetchBuckets()
     } else {
       const { bucket, prefix } = pathSlice(history.location.pathname)
       if (bucket) {
@@ -65,7 +65,7 @@ const mapStateToProps = state => {
 
 const mapDispatchToProps = dispatch => {
   return {
-    fetchBuckets: action => dispatch(actionsBuckets.fetchBuckets(action)),
+    fetchBuckets: () => dispatch(actionsBuckets.fetchBuckets()),
     setBucketList: buckets => dispatch(actionsBuckets.setList(buckets)),
     selectBucket: bucket => dispatch(actionsBuckets.selectBucket(bucket))
   }