diff --git a/altair/examples/cumulative_wiki_donations.py b/altair/examples/cumulative_wiki_donations.py
deleted file mode 100644
index 9c193aba2..000000000
--- a/altair/examples/cumulative_wiki_donations.py
+++ /dev/null
@@ -1,17 +0,0 @@
-"""
-Cumulative Wikipedia Donations
-==============================
-
-This chart shows cumulative donations to Wikipedia over the past 10 years. Inspired by this `Reddit post <https://www.reddit.com/r/dataisbeautiful/comments/7guwd0/cumulative_wikimedia_donations_over_the_past_10/>`_ but using lines instead of areas.
-"""
-# category: case studies
-import altair as alt
-
-source = "https://frdata.wikimedia.org/donationdata-vs-day.csv"
-
-alt.Chart(source).mark_line().encode(
-    alt.X('monthdate(date):T', title='Month', axis=alt.Axis(format='%B')),
-    alt.Y('max(ytdsum):Q', title='Cumulative Donations', stack=None),
-    alt.Color('year(date):O', legend=alt.Legend(title='Year')),
-    alt.Order('year(data):O')
-)