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 a6dc4d503d0855f3482c4c009f2513b1dc085e03..e9dc1c14c9762c806b545eeef99d1028d51182c1 100644
--- a/chrome/browser/resources/settings/settings_shared_css.html
+++ b/chrome/browser/resources/settings/settings_shared_css.html
@@ -355,13 +355,6 @@
             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;