fix for #167567. Message Display prefs: remove 2nd line for emoticon option.

initial patch contributed by stephend@netscape.com.  r/sr=sspitzer

suite/locales/en-US/chrome/mailnews/pref/pref-viewing_messages.dtd

@@ -52,7 +52,5 @@ Rights Reserved.
 <!ENTITY wrapInMsg.label                  "Wrap text to fit window width">
 <!ENTITY wrapInMsg.accesskey              "w">
 <!-- LOCALIZATION NOTE : (emoticonsAndStructs.label) 'Emoticons' are also known as 'Smileys', e.g. :-)   -->
-<!ENTITY convertEmoticons.label           "Display emoticons as graphics.">
+<!ENTITY convertEmoticons.label           "Display emoticons as graphics">
 <!ENTITY convertEmoticons.accesskey       "d">
-<!ENTITY example1.label                   "For example, display ' :-) ' as">
-<!ENTITY example2.label                   ".">