Remove unneeded component style module

- Single-line style rule can be replaced with a utility class

src/sidebar/components/annotation-action-bar.js

@@ -76,7 +76,7 @@ function AnnotationActionBar({
   };
 
   return (
-    <div className="annotation-action-bar">
+    <div className="annotation-action-bar u-layout-row">
       {showEditAction && <Button icon="edit" title="Edit" onClick={onEdit} />}
       {showDeleteAction && (
         <Button icon="trash" title="Delete" onClick={onDelete} />

src/styles/sidebar/components/annotation-action-bar.scss

-.annotation-action-bar {
-  display: flex;
-}

src/styles/sidebar/sidebar.scss

@@ -13,7 +13,6 @@
 
 // Components
 // ----------
-@use './components/annotation-action-bar';
 @use './components/annotation';
 @use './components/annotation-body';
 @use './components/annotation-document-info';