remove duplicated border in indicator area

IPython/html/static/notebook/less/notificationarea.less

@@ -12,12 +12,13 b''
     z-index: 10;
     text-align: center;
     width: auto;
-    border-left: 1px solid;
 }
 
 #kernel_indicator {
     .indicator_area();
     
+    border-left: 1px solid;
+    
     .kernel_indicator_name {
         padding-left: 5px;
         padding-right: 5px;

IPython/html/static/style/style.min.css

@@ -10530,7 +10530,6 b' ul#help_menu li a i {'
   z-index: 10;
   text-align: center;
   width: auto;
-  border-left: 1px solid;
 }
 #kernel_indicator {
   float: right !important;
@@ -10558,7 +10557,6 b' ul#help_menu li a i {'
   z-index: 10;
   text-align: center;
   width: auto;
-  border-left: 1px solid;
 }
 .edit_mode .modal_indicator:before {
   display: inline-block;