Remove tooltip from the urlbar.

browser/base/content/browser.xul

@@ -806,7 +806,6 @@ Contributor(s):
                  tabscrolling="true"
                  showcommentcolumn="true"
                  enablehistory="true"
-                 inputtooltiptext="&locationBar.tooltip;"
                  oninput="window.XULBrowserWindow.userTyped.value=true;"
                  ontextentered="return handleURLBarCommand(param);"
                  ontextreverted="return handleURLBarRevert();"

browser/base/locale/browser.dtd

@@ -90,7 +90,6 @@
 
 <!ENTITY throbber.tooltip             "Go to the &vendorShortName; home page">
 
-<!ENTITY locationBar.tooltip          "Enter search term, keyword, or web address">
 <!ENTITY proxyIcon.tooltip            "Drag and drop this icon to create a link to this page">
 
 <!-- Toolbar items -->