Author: #1197)

index.html

@@ -2111,7 +2111,6 @@ <h2>Definition of Roles</h2>
         <p>
           A <code>combobox</code> functionally combines a named input field with the ability to assist value selection via a supplementary popup element.
           A <code>combobox</code> input MAY be either a single-line text field that supports editing and typing or an element that only displays the current value of the <code>combobox</code>.
-          If an element with role <code>combobox</code> supports text input, authors MUST ensure that the text input has <pref>aria-multiline</pref> set to <code>false</code>.
           If the <code>combobox</code> supports text input and provides autocompletion behavior as described in <pref>aria-autocomplete</pref>, authors MUST set <pref>aria-autocomplete</pref> on the <code>combobox</code> element to the value that corresponds to the provided behavior.
         </p>
 				<p>