Revert "Add new datasets: tradesy, gowalla"

This reverts commit d65aad9.

Author: hieuddo

.gitignore

@@ -4,9 +4,4 @@
 !hello_world.txt
 *.npy
 *.csv
-*.dat
-
-# Large dataset files
-*.datcornac/datasets/gowalla/check-ins.zip
-cornac/datasets/tradesy/item_features.zip
-cornac/datasets/gowalla/check-ins.zip
+*.dat

README.md

@@ -17,10 +17,9 @@ This repository contains various recommendation systems datasets for [Cornac](ht
 * [x] movielens
 * [ ] netflix
 * [x] tafeng
-* [x] tradesy
-  * [x] `users.zip`
-  * [x] `item_features.zip`
-  * [x] `item_ids.zip`
+* [ ] tradesy
+  * [ ] `users.zip`
+  * [ ] `item_features.zip`
 * [x] yoochoose
   * [x] `buy.zip`
   * [x] `click.zip` (GitHub releases: https://github.com/PreferredAI/static-data/releases/download/yoochoose/click.zip)