remove empty tutorial page

docs/abn-tree.yml

@@ -38,7 +38,6 @@
 - tutorials:
     title: Tutorials
     children:
-      - introduction-to-extending.md: Introduction to extending ACA
       - custom-route-with-parameters.md: Custom route with parameters
       - dialog-actions.md: Dialog actions
 - help.md: 'Get help'

docs/ja/abn-tree.yml

@@ -38,7 +38,6 @@
 - tutorials:
     title: Tutorials
     children:
-      - introduction-to-extending.md: Introduction to extending ACA
       - custom-route-with-parameters.md: Custom route with parameters
       - dialog-actions.md: Dialog actions
 - help.md: 'Get help'

docs/toc.md

@@ -33,7 +33,6 @@
   - [Tutorials](/extending/tutorials)
   - [Redistributable libraries](/extending/redistributable-libraries)
 - [Tutorials](/tutorials/)
-  - [Introduction to extending ACA](/tutorials/introduction-to-extending)
   - [Custom route with parameters](/tutorials/custom-route-with-parameters)
   - [Dialog actions](/tutorials/dialog-actions)
 - [Get help](/help)

docs/tutorials/README.md

@@ -9,6 +9,5 @@ Learn more about developing with the Alfresco Content Application.
 
 ## Contents
 
-- [Introduction to extending ACA](/tutorials/introduction-to-extending)
 - [Custom route with parameters](/tutorials/custom-route-with-parameters)
-- [Dialog actions](/tutorials/dialog-actions)
+- [Dialog actions](/tutorials/dialog-actions)

docs/tutorials/introduction-to-extending.md

@@ -1,7 +0,0 @@
----
-Title: Introduction to extending ACA
----
-
-# Introduction to extending the Alfresco Content Application
-
-Place holder for a future tutorial.