Remove reference to defunct Customizer from v3

cvrebert · cvrebert · commit 3f2943424f1a · 2015-11-29T20:54:45.000-08:00
[ci skip]
diff --git a/scss/_variables.scss b/scss/_variables.scss
@@ -327,8 +327,6 @@ $dropdown-header-color:          $gray-light !default;
 //
 // Warning: Avoid customizing these values. They're used for a bird's eye view
 // of components dependent on the z-axis and are designed to all work together.
-//
-// Note: These variables are not generated into the Customizer.
 
 $zindex-navbar:            1000 !default;
 $zindex-dropdown:          1000 !default;
