Removing enable_style_sheets pref UI. (39552)

xpfe/components/prefwindow/resources/content/pref-advanced.xul

@@ -69,9 +69,6 @@
               prefattribute="checked"/>
     <!-- XXX -->              
               
-    <checkbox id="CSSAllow" value="&enbCssCheck.label;" accesskey="&enbCssCheck.accesskey;"
-              pref="true" preftype="bool" prefstring="css.allow"
-              prefattribute="checked"/>
     <checkbox id="advancedMailFTP" value="&sendAddFtpCheck.label;" accesskey="&sendAddFtpCheck.accesskey;"
               pref="true" preftype="bool" prefstring="advanced.mailftp"
               prefattribute="checked"/>

xpfe/components/prefwindow/resources/locale/en-US/pref-advanced.dtd

@@ -20,9 +20,6 @@
 <!ENTITY enbJsCheckMailNews.label     "Enable JavaScript for Mail and News">
 <!ENTITY enbJsCheckMailNews.accesskey "m">
 
-<!ENTITY enbCssCheck.label            "Enable style sheets for web pages">
-<!ENTITY enbCssCheck.accesskey        "s">
-
 <!ENTITY sendAddFtpCheck.label        "Send email address as anonymous FTP password">
 <!ENTITY sendAddFtpCheck.accesskey    "e">