Remove unused pref.

include/load_prefs.php

@@ -214,7 +214,6 @@ $enable_forward_as_attachment =
 $show_xmailer_default =
     getPref($data_dir, $username, 'show_xmailer_default', SMPREF_OFF );
 $attachment_common_show_images = getPref($data_dir, $username, 'attachment_common_show_images', SMPREF_OFF );
-$pf_subtle_link = getPref($data_dir, $username, 'pf_subtle_link', SMPREF_ON);
 $pf_cleandisplay = getPref($data_dir, $username, 'pf_cleandisplay', SMPREF_OFF);
 
 /* message disposition notification support setting */

include/options/display.php

@@ -229,13 +229,6 @@ function load_optpage_data_display() {
         'refresh' => SMOPT_REFRESH_NONE
     );
 
-    $optvals[SMOPT_GRP_MESSAGE][] = array(
-        'name'    => 'pf_subtle_link',
-        'caption' => _("Enable Subtle Printer Friendly Link"),
-        'type'    => SMOPT_TYPE_BOOLEAN,
-        'refresh' => SMOPT_REFRESH_NONE
-    );
-
     $optvals[SMOPT_GRP_MESSAGE][] = array(
         'name'    => 'pf_cleandisplay',
         'caption' => _("Enable Printer Friendly Clean Display"),