remove dead links

docs/modules/ROOT/pages/jme3.adoc

@@ -15,28 +15,8 @@ Now that you understood the basics, let's put it all together. The following int
 
 === jMonkeyEngine3 Concepts
 
-*  <<jme3/intermediate/best_practices#,Best Practices>>
-*  <<jme3/intermediate/simpleapplication#,SimpleApplication>>
 *  <<jme3/intermediate/appsettings#,AppSettings>>
 *  <<jme3/intermediate/optimization#,Optimization>>
-*  <<jme3/faq#,Frequently Asked Questions (FAQ)>>
-
-=== Maths Concepts
-
-*  <<jme3/math_for_dummies#,jME3 Math for Dummies>>
-*  <<jme3/intermediate/math#,Short 3D math &quot;cheat sheet&quot;>>
-*  <<jme3/math#,jME3 math overview>>
-*  <<jme3/rotate#,3-D Rotation>>
-*  <<jme3/math_video_tutorials#,Videos: jME3 math video tutorial series>>
-
-=== 3D Graphics Concepts
-
-*  <<jme3/intermediate/multi-media_asset_pipeline#,Multi-Media Asset Pipeline>>
-*  <<jme3/scenegraph_for_dummies#,3D Scene Graph for Dummies>>
-**  xref:tutorials:beginner/hellovector.adoc[Hello Vector]
-*  <<jme3/terminology#,3D Graphics Terminology>>
-*  <<jme3/intermediate/how_to_use_materials#,How to Use Materials>>
-*  <<jme3/intermediate/transparency_sorting#,Transparency Sorting>>
 *  <<jme3/external/blender#,Creating compatible models in blender>>
 *  <<jme3/external/3dsmax#,Creating compatible models in 3dsmax>>