tooltip on dir tree is annoying (76696). r=dougt sr=blake a=asa

suite/common/directory/directory.xul

@@ -28,7 +28,6 @@
 <!DOCTYPE window SYSTEM "chrome://communicator/locale/directory/directory.dtd">
 
 <window style="overflow: auto"
-  title="&directoryWindowTitle.label;" 
   xmlns:html="http://www.w3.org/1999/xhtml"
   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
   xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"

suite/locales/en-US/chrome/common/directory/directory.dtd

@@ -1,4 +1,3 @@
-<!ENTITY directoryWindowTitle.label "Directory Contents">
 <!ENTITY directoryWindow.filename.label "Name">
 <!ENTITY directoryWindow.contentlength.label "Size">
 <!ENTITY directoryWindow.lastmodified.label "Last Modified">