remove unnecessary jquery-ui (#2925)

pages/charts/flot.html

@@ -896,8 +896,6 @@
 
 <!-- jQuery -->
 <script src="../../plugins/jquery/jquery.min.js"></script>
-<!-- jQuery UI -->
-<script src="../../plugins/jquery-ui/jquery-ui.min.js"></script>
 <!-- Bootstrap 4 -->
 <script src="../../plugins/bootstrap/js/bootstrap.bundle.min.js"></script>
 <!-- AdminLTE App -->

pages/gallery.html

@@ -934,8 +934,6 @@
 <script src="../plugins/jquery/jquery.min.js"></script>
 <!-- Bootstrap -->
 <script src="../plugins/bootstrap/js/bootstrap.bundle.min.js"></script>
-<!-- jQuery UI -->
-<script src="../plugins/jquery-ui/jquery-ui.min.js"></script>
 <!-- Ekko Lightbox -->
 <script src="../plugins/ekko-lightbox/ekko-lightbox.min.js"></script>
 <!-- AdminLTE App -->