just removing some unused files from Help, bug=161740, dispensation per bug 162559

extensions/help/resources/jar.mn

@@ -30,15 +30,12 @@ en-US.jar:
         locale/en-US/help/cs_nav_prefs_advanced.html    (locale/en-US/cs_nav_prefs_advanced.html) 
         locale/en-US/help/cs_nav_prefs_appearance.html  (locale/en-US/cs_nav_prefs_appearance.html) 
         locale/en-US/help/cs_nav_prefs_navigator.html   (locale/en-US/cs_nav_prefs_navigator.html)
-        locale/en-US/help/cs_nav_sidebar.html           (locale/en-US/cs_nav_sidebar.html)
         locale/en-US/help/page_info_help.html           (locale/en-US/page_info_help.html)  
         locale/en-US/help/passwords_help.html           (locale/en-US/passwords_help.html)
-        locale/en-US/help/prefs_help.html               (locale/en-US/prefs_help.html)
         locale/en-US/help/privacy_help.html             (locale/en-US/privacy_help.html)
         locale/en-US/help/privsec_help.html             (locale/en-US/privsec_help.html)
         locale/en-US/help/profiles_help.html            (locale/en-US/profiles_help.html)
         locale/en-US/help/ssl_help.html                 (locale/en-US/ssl_help.html)
-        locale/en-US/help/ssl_page_info_help.html       (locale/en-US/ssl_page_info_help.html)
         locale/en-US/help/using_priv_help.html          (locale/en-US/using_priv_help.html)
         locale/en-US/help/using_certs_help.html         (locale/en-US/using_certs_help.html)
         locale/en-US/help/validation_help.html          (locale/en-US/validation_help.html)