Remove gray line in the new user dialog and remove margin.

chrome/browser/resources/options/manage_profile_overlay.css

Index: chrome/browser/resources/options/manage_profile_overlay.css
diff --git a/chrome/browser/resources/options/manage_profile_overlay.css b/chrome/browser/resources/options/manage_profile_overlay.css
index 4bbdb02c56103c9877ec763242c6d8f38a7f1ae4..29ca51a083b05a8651e77e4ad6fe25301f98fc63 100644
--- a/chrome/browser/resources/options/manage_profile_overlay.css
+++ b/chrome/browser/resources/options/manage_profile_overlay.css
@@ -61,17 +61,6 @@
   padding: 2px;
 }
 
-/* Adds a grey horizontal line below content area.  */
-#create-profile-content::after,
-#manage-profile-content::after {
-  background: #c0c0c0;
-  content: '';
-  display: block;
-  height: 1px;
-  margin-top: 25px;
-  width: 100%;
-}
-
 :-webkit-any(#create-profile-content, #manage-profile-content) >
     :not(:last-child) {
   margin-bottom: 10px;