Remove tooltip from add badge and issue token remove button

See https://gitlab.com/gitlab-org/gitlab-ce/issues/34336

app/assets/javascripts/issuable/related_issues/components/issue_token.vue

@@ -119,11 +119,10 @@ export default {
     </component>
     <button
       v-if="canRemove"
-      v-tooltip
       ref="removeButton"
       type="button"
       class="js-issue-token-remove-button issue-token-remove-button"
-      :title="removeButtonLabel"
+      :aria-label="removeButtonLabel"
       @click="onRemoveRequest">
       <i
         class="fa fa-times"

app/assets/javascripts/issuable/related_issues/components/related_issues_block.vue

@@ -117,11 +117,9 @@ export default {
             </span>
             <button
               v-if="canAddRelatedIssues"
-              v-tooltip
               ref="issueCountBadgeAddButton"
               type="button"
               class="js-issue-count-badge-add-button issue-count-badge-add-button btn btn-small btn-default"
-              title="Add an issue"
               aria-label="Add an issue"
               data-placement="top"
               @click="toggleAddRelatedIssuesForm">