Infra 3937 - remove ad 18 img

Signed-off-by: Yi Liu <yi.liu@eclipse-foundation.org>
Change-Id: Ic9ab61f60e1695f60ad5bd145ed316fa2ca18376
diff --git a/promo/images/future-dev-summit-ad.png b/promo/images/future-dev-summit-ad.png
deleted file mode 100644
index bf5434e..0000000
--- a/promo/images/future-dev-summit-ad.png
+++ /dev/null
Binary files differ