Remove duplicate information about the Task Force and place relevant …

…info at the top

pages/about/groups/task-forces/pdf-aam.md

@@ -11,7 +11,7 @@ github:
 {% include box.html type="start" title="Summary" class="" %}
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-The Portable Document Format Accessibility <abbr title="Application Programming Interfaces">APIs</abbr> Mapping (PDF-AAM) Task Force is a task force of the [Accessible Rich Internet Applications (ARIA) Working Group](/about/groups/ariawg/).
+The Portable Document Format Accessibility <abbr title="Application Programming Interfaces">APIs</abbr> Mapping (PDF-AAM) Task Force is a task force of the [Accessible Rich Internet Applications (ARIA) Working Group](/about/groups/ariawg/). It assists this Working Group to develop [PDF-AAM](http://w3c.github.io/pdf-aam/) and keep it in sync with WAI-ARIA.
 
 Some information on this page is also shown on, and may be more current in, the [PDF-AAM page](https://www.w3.org/groups/tf/pdf-aam/).
 
@@ -86,8 +86,6 @@ For ways you can contribute to the work without joining the Task Force, see [ARI
 
 ## Administrative Information
 
-The PDF-AAM Task Force is a task force of the [Accessible Rich Internet Applications (ARIA) Working Group](/about/groups/ariawg/). It assists this Working Group to develop [PDF-AAM](http://w3c.github.io/pdf-aam/) and keep it in sync with WAI-ARIA.
-
 ### Facilitator and Contacts
 
 - **Facilitators:** Duff Johnson, Valerie Young