rwm: remove edges arg of get_decoration

This was a leftover from an earlier design iteration.

 protocol/river-window-management-v1.xml | 1 -
 1 file changed, 1 deletion(-)

diff --git a/protocol/river-window-management-v1.xml b/protocol/river-window-management-v1.xml
index 95475f8..ff65369 100644
--- a/protocol/river-window-management-v1.xml
+++ b/protocol/river-window-management-v1.xml
@@ -297,7 +297,6 @@
       </description>
       <arg name="id" type="new_id" interface="river_decoration_v1"/>
       <arg name="surface" type="object" interface="wl_surface"/>
-      <arg name="edge" type="uint" enum="decoration_edge"/>
     </request>
   </interface>