diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index 98a6bbe..b6a23fa 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -1929,7 +1929,6 @@ function theme_table($variables) {
     $i=0;
     foreach ($header as $cell) {
       $i++;
-
       // Track responsive classes for each column as needed.
       if (!empty($cell['class']) && is_array($cell['class'])) {
         if (in_array(RWD_ADVISABLE, $cell['class'])) {
@@ -1939,11 +1938,9 @@ function theme_table($variables) {
           $responsive[$i] =  RWD_HELPFUL;
         }
       }
-
       $cell = tablesort_header($cell, $header, $ts);
       $output .= _theme_table_cell($cell, TRUE);
     }
-
     // Using ternary operator to close the tags based on whether or not there are rows
     $output .= (count($rows) ? " </tr></thead>\n" : "</tr>\n");
   }
@@ -1987,7 +1984,6 @@ function theme_table($variables) {
           $i++;
           // Add active class if needed for sortable tables.
           $cell = tablesort_cell($cell, $header, $ts, $i);
-
           // Copy advisable/helpful class from header to cell as needed.
           if (isset($responsive[$i])) {
             if (is_array($cell)) {
@@ -1997,7 +1993,6 @@ function theme_table($variables) {
               $cell = array('data' => $cell, 'class' => $responsive[$i]);
             }
           }
-
           $output .= _theme_table_cell($cell);
         }
         $output .= " </tr>\n";
diff --git a/core/modules/system/system.module b/core/modules/system/system.module
index 03290a6..caa4ea9 100644
--- a/core/modules/system/system.module
+++ b/core/modules/system/system.module
@@ -1297,26 +1297,12 @@ function system_library_info() {
     ),
   );
 
-  // Drupal's tableheader library.
-  $libraries['drupal.tableheader'] = array(
-    'title' => 'Drupal tableheader API',
-    'version' => VERSION,
-    'js' => array(
-      'core/misc/tableheader.js' => array('group' => JS_LIBRARY,),
-    ),
-    'dependencies' => array(
-      array('system', 'jquery'),
-      array('system', 'drupal'),
-      array('system', 'jquery.once'),
-    ),
-  );
-
   // Drupal's tabledrag library.
   $libraries['drupal.tabledrag'] = array(
     'title' => 'Drupal tabledrag',
     'version' => VERSION,
     'js' => array(
-      'core/misc/tabledrag.js' => array('group' => JS_LIBRARY, 'cache' => FALSE),
+      'core/misc/tabledrag.js' => array('group' => JS_LIBRARY, 'weight' => -1),
     ),
     'dependencies' => array(
       array('system', 'jquery'),
@@ -1332,7 +1318,7 @@ function system_library_info() {
     'title' => 'Drupal responsive table API',
     'version' => VERSION,
     'js' => array(
-      'core/misc/tableresponsive.js' => array('group' => JS_LIBRARY,),
+      'core/misc/tableresponsive.js' => array('group' => JS_LIBRARY),
     ),
     'dependencies' => array(
       array('system', 'jquery'),