[PALEMOON] Clean up advanced prefs XUL

Remove commented out old Firefox prefs that haven't been used in a
loon while and aren't going to be reinstated.

application/palemoon/components/preferences/advanced.xul

@@ -27,10 +27,7 @@
       <!--XXX button prefs -->
 
       <!-- General tab -->
-<!-- Pale Moon: remove accessibility features, they confuse people anyway  -->
-<!--      <preference id="accessibility.browsewithcaret"   name="accessibility.browsewithcaret"   type="bool"/> -->
       <preference id="accessibility.typeaheadfind"     name="accessibility.typeaheadfind"     type="bool"/>
-<!--      <preference id="accessibility.blockautorefresh"  name="accessibility.blockautorefresh"  type="bool"/> -->
 
       <preference id="general.autoScroll"              name="general.autoScroll"              type="bool"/>
       <preference id="general.smoothScroll"            name="general.smoothScroll"            type="bool"/>
@@ -52,8 +49,6 @@
 #endif
       <preference id="pref.general.compatmode" name="general.useragent.compatMode"        type="int"/>
 
-      <!-- Data Choices tab -->
-
       <!-- Network tab -->
       <preference id="browser.cache.disk.capacity"     name="browser.cache.disk.capacity"     type="int"/>
 
@@ -136,22 +131,13 @@
         <tabpanel id="generalPanel" orient="vertical">
 
           <!-- Accessibility -->
-<!-- Pale Moon: remove accessibility features, they confuse people anyway  -->
           <groupbox id="accessibilityGroup" align="start">
             <caption label="&accessibility.label;"/>
 
-<!--            <checkbox id="useCursorNavigation"
-                      label="&useCursorNavigation.label;"
-                      accesskey="&useCursorNavigation.accesskey;"
-                      preference="accessibility.browsewithcaret"/> -->
             <checkbox id="searchStartTyping"
                       label="&searchStartTyping.label;"
                       accesskey="&searchStartTyping.accesskey;"
                       preference="accessibility.typeaheadfind"/>
-<!--            <checkbox id="blockAutoRefresh"
-                      label="&blockAutoRefresh.label;"
-                      accesskey="&blockAutoRefresh.accesskey;"
-                      preference="accessibility.blockautorefresh"/> -->
           </groupbox>
 
           <!-- Browsing -->