[MASSEMBLY-974] Drop deprecated repository element from documentation

Code was removed in 6c7b43c
We should update documentation according to change.

src/site/apt/advanced-descriptor-topics.apt.vm

@@ -41,7 +41,7 @@ Advanced Assembly-Descriptor Topics
   add the file to the archive "wins". The filtering is done solely based
   on name inside the archive, so the same source file can be added under
   different output names. The order of the phases is as follows:
-  1) FileItem 2) FileSets 3) ModuleSet 4) DepenedencySet and 5) Repository elements.
+  1) FileItem 2) FileSets 3) ModuleSet 4) DepenedencySet.
 
   Elements of the same type will be processed in the order they appear in the
   descriptors. If you need to "overwrite" a file included by a previous set,

src/site/apt/examples/index.apt

@@ -41,8 +41,6 @@ Examples
 
     * {{{./single/using-components.html}Using Component Descriptors}}
 
-    * {{{./single/using-repositories.html}Using Repositories}}
-
     * {{{./single/using-container-descriptor-handlers.html}Using Container Descriptor Handlers}}
 
     []

src/site/apt/examples/single/index.apt

@@ -39,6 +39,4 @@ Single Project Examples
 
   * {{{./using-components.html}Using Component Descriptors}}
 
-  * {{{./using-repositories.html}Using Repositories}}
-
   * {{{./using-container-descriptor-handlers.html}Using Container Descriptor Handlers}}

src/site/site.xml

@@ -52,7 +52,6 @@ under the License.
         <item name="Filtering Some Distribution Files" href="./examples/single/filtering-some-distribution-files.html"/>
         <item name="Including/Excluding Artifacts" href="./examples/single/including-and-excluding-artifacts.html"/>
         <item name="Using Component Descriptors" href="./examples/single/using-components.html"/>
-        <item name="Using Repositories" href="./examples/single/using-repositories.html"/>
         <item name="Using Container Descriptor Handlers" href="./examples/single/using-container-descriptor-handlers.html"/>
       </item>
       <item name="Multimodule Projects" collapse="false" href="./examples/multimodule/index.html">