get rid of observers for the progress meter and status text area

mailnews/base/resources/content/messenger.xul

@@ -323,11 +323,7 @@ Rights Reserved.
 			<box id="status-bar">
 				<box align="vertical" style="width:100px">
 					<spring flex="100%"/>
-					<progressmeter id="statusbar-icon" mode="normal" value="0" onclick="dumpProgress()">
-						<observes element="Messenger:LoadingProgress" attribute="mode"/>
-						<observes element="Messenger:LoadingProgress" attribute="value"/>
-						<observes element="Messenger:Throbber" attribute="busy"/>
-					</progressmeter>
+					<progressmeter id="statusbar-icon" mode="normal" value="0" onclick="dumpProgress()"/>
 					<spring flex="100%"/>
 				</box>