meta-agl.md: remove link to meta-agl-extra

- this link does not exist anymore

Change-Id: I912a0396d890b8548d3d8388852c685ee17d2d2b
Signed-off-by: Clément Bénier <clement.benier@iot.bzh>

diff --git a/meta-agl.md b/meta-agl.md
index 59167ad..19f80ee 100755 (executable)
--- a/meta-agl.md
+++ b/meta-agl.md
@@ -9,7 +9,7 @@ You use this layer as the minimal core on which to build AGL profiles.
   [`meta-agl-demo`](./meta-agl-demo.html) layer.
   Furthermore, `meta-agl` does not include additional components, such
   as security, which are part of the
-  [`meta-agl-extra`](./meta-agl-extra.html) layer.
+  `meta-agl-extra` layer.
 
 ## Sub-Layers