accessbility fixes

Author: Swapnamol

LearningHub.Nhs.WebUI/Scripts/vuesrc/contribute-resource/components/questions/SingleChoiceAnswer.vue

@@ -27,8 +27,7 @@
             <hr class="cutoff-line">
         </div>
         <div>
-            <label class="nhsuk-u-visually-hidden" for="message"></label>
-            <input type="text" id="message" name="message" aria-describedby="messageError" class="form-control text-input" maxlength="120" v-model="message" />
+            <input type="text" aria-describedby="messageError" class="form-control text-input" maxlength="120" v-model="message" />
             <div class="footer-text" id="messageError">
                 You have {{ charactersRemaining }} characters remaining.
             </div>