Backed out 1 changesets (bug 1889866) from esr115 for causing test failures

Backed out changeset 7089cb4c66b3 (bug 1889866)

browser/components/syncedtabs/sidebar.xhtml

@@ -15,10 +15,7 @@
 
     <link
       rel="stylesheet"
-      href="chrome://global/skin/design-system/tokens-brand.css"
-    />
-    <link
-      rel="stylesheet"
+      media="all"
       href="chrome://browser/skin/syncedtabs/sidebar.css"
     />
     <link rel="localization" href="browser/syncedTabs.ftl" />

browser/themes/shared/syncedtabs/sidebar.css

@@ -237,12 +237,17 @@ body {
 
 .deck .instructions {
   text-align: center;
-  color: var(--text-color-deemphasized);
+  color: GrayText;
   padding: 0 11px;
   max-width: 15em;
   margin: 0 auto;
 }
 
+:root[lwt-sidebar] .deck .instructions {
+  color: inherit;
+  opacity: .6;
+}
+
 .deck .button {
   display: block;
   background-color: #0060df;