Docs: Remove hard coded width from image

Bug: b/19231083
Change-Id: I4ad7865b8512bd451b78ee7716e1e19e4a1c9812
diff --git a/src/accessories/headset/requirements.jd b/src/accessories/headset/requirements.jd
index f8ed1e9..a9c1621 100644
--- a/src/accessories/headset/requirements.jd
+++ b/src/accessories/headset/requirements.jd
@@ -57,7 +57,7 @@
 
 <h3 id=one_button>One button</h3>
 
-<img src="images/media_one.png" width="80%" alt="Button functions for one-button headsets handling a media stream.">
+<img src="images/media_one.png" alt="Button functions for one-button headsets handling a media stream.">
 </span>
 
 <p class="img-caption"><strong>Figure 1.</strong> Button functions for one-button headsets handling a media stream.</p>