Remove unmatched </gr-autocomplete-dropdown> tag

Release-Notes: skip
Change-Id: I0712fe87d411c09f29f172f9ebc1e868bdd2aea4
diff --git a/polygerrit-ui/app/elements/shared/gr-textarea/gr-textarea.ts b/polygerrit-ui/app/elements/shared/gr-textarea/gr-textarea.ts
index 169cd59..dd08544 100644
--- a/polygerrit-ui/app/elements/shared/gr-textarea/gr-textarea.ts
+++ b/polygerrit-ui/app/elements/shared/gr-textarea/gr-textarea.ts
@@ -234,9 +234,7 @@
       hiddenText in order to correctly position the dropdown. After being moved,
       it is set as the positionTarget for the emojiSuggestions dropdown. -->
       <span id="caratSpan"></span>
-      ${this.renderEmojiDropdown()}
-      ${this.renderMentionsDropdown()}
-      </gr-autocomplete-dropdown>
+      ${this.renderEmojiDropdown()} ${this.renderMentionsDropdown()}
       <iron-autogrow-textarea
         id="textarea"
         class=${classMap({noBorder: this.hideBorder})}