editorial(graphics-aria): remove common.css & adjust tables

As per editors discussion, removes common.css and
replaces .role-features with respec's .def

Part of #2410

graphics-aria/index.html

@@ -8,7 +8,6 @@
     <script src="../common/script/resolveReferences.js" class="remove"></script>
     <script src="../common/biblio.js" class="remove" defer="defer"></script>
     <script src="../common/script/participants.js" class="remove"></script>
-    <link href="../common/css/common.css" rel="stylesheet" type="text/css" />
     <script class="remove" src="../common/script/ariaChild.js"></script>
     <script class="remove" src="../common/script/roleInfo.js"></script>
     <script class="remove">
@@ -466,7 +465,7 @@ <h2>Definition of Roles</h2>
               >
             </aside>
           </div>
-          <table class="role-features">
+          <table class="def"
             <caption>
               Characteristics:
             </caption>
@@ -703,7 +702,7 @@ <h2>Definition of Roles</h2>
 </div>
 -->
           </div>
-          <table class="role-features">
+          <table class="def"
             <caption>
               Characteristics:
             </caption>
@@ -889,7 +888,7 @@ <h2>Definition of Roles</h2>
               >
             </aside>
           </div>
-          <table class="role-features">
+          <table class="def"
             <caption>
               Characteristics:
             </caption>