Remove early return when setting an existing attribute value and the attribute moves elements during the TT callback

Author: lukewarlow

dom.bs

@@ -8059,9 +8059,6 @@ string <var>value</var>, run these steps:
    <li><p>If <var>attribute</var>'s <a for=Attr>element</a> is null, then set <var>attribute</var>'s
    <a for=Attr>value</a> to <var>verifiedValue</var>, and return.
 
-   <li><p>If <var>attribute</var>'s <a for=Attr>element</a> is not <var>element</var>, then
-   return.
-
    <li><p><a lt="change an attribute">Change</a> <var>attribute</var> to <var>verifiedValue</var>.
   </ol>
 </ol>