Removed test link.

src/docs/asciidoc/jme3/contributions.adoc

@@ -114,7 +114,7 @@ a| *Contact person*
 a| link:https://hub.jmonkeyengine.org/users/mifth/activity[mifth]
 
 a| *Documentation*
-a| <<sdk/plugin/shaderblow#,Wiki Page>> <<sdk/development/extension_library#,test link>>
+a| <<sdk/plugin/shaderblow#,Wiki Page>>
 
 a| *Available as SDK plugin*
 a| Yes