Remove .navbar-divider; it's undocumented and wasn't updated with the flexbox...

Remove .navbar-divider; it's undocumented and wasn't updated with the flexbox navbar updates, so it's kinda bunk right now

scss/_navbar.scss

@@ -71,25 +71,6 @@
 }
 
 
-// Navbar divider
-//
-//
-
-.navbar-divider {
-  float: left;
-  width: $border-width;
-  padding-top: $navbar-divider-padding-y;
-  padding-bottom: $navbar-divider-padding-y;
-  margin-right: $navbar-padding-x;
-  margin-left:  $navbar-padding-x;
-  overflow: hidden;
-
-  &::before {
-    content: "\00a0";
-  }
-}
-
-
 // Responsive navbar
 //
 // Custom styles for responsive collapsing and toggling of navbar contents.

scss/_variables.scss

@@ -611,8 +611,6 @@ $navbar-padding-y:                  ($spacer / 2) !default;
 
 $navbar-brand-padding-y:            .25rem !default;
 
-$navbar-divider-padding-y:          .425rem !default;
-
 $navbar-toggler-padding-x:           .75rem !default;
 $navbar-toggler-padding-y:           .25rem !default;
 $navbar-toggler-font-size:           $font-size-lg !default;