Revert "MD Settings: Expanding cards should not overlap header"

chrome/browser/resources/settings/settings_ui/settings_ui.html

Index: chrome/browser/resources/settings/settings_ui/settings_ui.html
diff --git a/chrome/browser/resources/settings/settings_ui/settings_ui.html b/chrome/browser/resources/settings/settings_ui/settings_ui.html
index 4a2378421d81dc450c27681024c37650e7fb1e97..5b527c4daa56bee2d7ab01adcd03076d8d3564ab 100644
--- a/chrome/browser/resources/settings/settings_ui/settings_ui.html
+++ b/chrome/browser/resources/settings/settings_ui/settings_ui.html
@@ -119,15 +119,6 @@
         --paper-input-max-width: 200px;
       }
 
-      paper-header-panel {
-        --paper-header-panel-shadow: {
-          z-index: 1;
-        };
-        --paper-header-panel-standard-container: {
-          z-index: 0;
-        };
-      }
-
       paper-toolbar {
         --paper-toolbar-height: 56px;
         --paper-toolbar-sm-height: 56px;