diff --git a/skin/classic/treestyletab/metal/tab.css b/skin/classic/treestyletab/metal/tab.css
index 56c682f2..91a1db6b 100644
--- a/skin/classic/treestyletab/metal/tab.css
+++ b/skin/classic/treestyletab/metal/tab.css
@@ -194,23 +194,6 @@
 
 /* pinned tabs */
 
-.tabbrowser-tabs[treestyletab-mode="vertical"]
-  .tabbrowser-tab:not(:hover)
-  .tab-content[pinned],
-.tabbrowser-tabs[treestyletab-mode="vertical"]
-  .tabbrowser-tab:hover
-  .tab-content[pinned],
-.tabbrowser-tabs[treestyletab-mode="vertical"]
-  .tabbrowser-tab[visuallyselected]:not(:hover)
-  .tab-content[pinned],
-.tabbrowser-tabs[treestyletab-mode="vertical"]
-  .tabbrowser-tab[visuallyselected]:hover
-  .tab-content[pinned] {
-	-moz-border-image: none !important;
-	border-image: none !important;
-	margin: 0 !important;
-	padding: 0 !important;
-}
 .tabbrowser-tabs[treestyletab-mode="vertical"]
   .tabbrowser-tab:not(:hover)
   .tab-content[pinned]:not([titlechanged]),