MD Settings: cr-slider: Make display consistent and clean up.

chrome/browser/resources/settings/settings_shared_css.html

Index: chrome/browser/resources/settings/settings_shared_css.html
diff --git a/chrome/browser/resources/settings/settings_shared_css.html b/chrome/browser/resources/settings/settings_shared_css.html
index 78fbc14dcd1f0d2acd7b2d8341be70cd811f4986..8b4b3825d6db6c3653c0bcacd616e95f4d541224 100644
--- a/chrome/browser/resources/settings/settings_shared_css.html
+++ b/chrome/browser/resources/settings/settings_shared_css.html
@@ -339,13 +339,6 @@
             var(--checkbox-spacing));
       }
 
-      /* Keep the slider color consistent throughout the range. */
-      cr-slider.always-on {
-        --paper-slider-knob-start-border-color: var(--google-blue-700);
-        --paper-slider-knob-start-color: var(--google-blue-700);
-        --paper-slider-pin-start-color: var(--google-blue-700);
-      }
-
       .favicon-image {
         background-repeat: no-repeat;
         background-size: contain;