Revert "create definition of play button"

This reverts commit c912a9a.

Author: carlosapaduarte

_rules/audio-as-media-alternative-afb423.md

@@ -25,7 +25,9 @@ acknowledgments:
 This rule applies to every [non-streaming](#non-streaming-media-element) `audio` element that is:
 
 - playing; or,
-- has a [play button][] that is [visible][] and [included in the accessibility tree][].
+- has a "play button" that is [visible][] and [included in the accessibility tree][].
+
+**Note:** A play button is an interactive element that when activated, plays the audio.
 
 ## Expectation 1
 
@@ -189,5 +191,4 @@ This `audio` element describes some of the text on the same page. The text on th
 ```
 
 [included in the accessibility tree]: #included-in-the-accessibility-tree 'Definition of included in the accessibility tree'
-[play button]: #play-button 'Definition of play button'
 [visible]: #visible 'Definition of visible'

_rules/audio-text-alternative-e7aa44.md

@@ -35,7 +35,9 @@ acknowledgments:
 This rule applies to any [non-streaming](#non-streaming-media-element) `audio` element that is:
 
 - playing; or,
-- has a [play button][] that is [visible][] and [included in the accessibility tree](#included-in-the-accessibility-tree).
+- has a "play button" that is [visible][] and [included in the accessibility tree](#included-in-the-accessibility-tree).
+
+**Note:** A play button is an interactive element that when activated, plays the audio.
 
 ## Expectation
 
@@ -184,5 +186,4 @@ This `a` element links to an audio file, but there is no `audio` element on this
 </html>
 ```
 
-[play button]: #play-button 'Definition of play button'
 [visible]: #visible 'Definition of visible'

_rules/audio-transcript-2eb176.md

@@ -25,7 +25,9 @@ acknowledgments:
 This rule applies to every [non-streaming](#non-streaming-media-element) `audio` element that is:
 
 - playing; or,
-- has a [play button][] that is [visible][] and [included in the accessibility tree][].
+- has a "play button" that is [visible][] and [included in the accessibility tree][].
+
+**Note:** A play button is an interactive element that when activated, plays the audio.
 
 ## Expectation
 
@@ -195,5 +197,4 @@ This `audio` element has hidden native player controls.
 ```
 
 [included in the accessibility tree]: #included-in-the-accessibility-tree 'Definition of included in the accessibility tree'
-[play button]: #play-button 'Definition of play button'
 [visible]: #visible 'Definition of visible'