diff --git a/mail/base/content/unix/Makefile.in b/mail/base/content/unix/Makefile.in
deleted file mode 100644
index 985a81fc23a4..000000000000
--- a/mail/base/content/unix/Makefile.in
+++ /dev/null
@@ -1,47 +0,0 @@
-#
-# ***** BEGIN LICENSE BLOCK *****
-# Version: MPL 1.1/GPL 2.0/LGPL 2.1
-#
-# The contents of this file are subject to the Mozilla Public License Version
-# 1.1 (the "License"); you may not use this file except in compliance with
-# the License. You may obtain a copy of the License at
-# http://www.mozilla.org/MPL/
-#
-# Software distributed under the License is distributed on an "AS IS" basis,
-# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
-# for the specific language governing rights and limitations under the
-# License.
-#
-# The Original Code is mozilla.org code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 2000
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#
-# Alternatively, the contents of this file may be used under the terms of
-# either the GNU General Public License Version 2 or later (the "GPL"), or
-# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
-# in which case the provisions of the GPL or the LGPL are applicable instead
-# of those above. If you wish to allow use of your version of this file only
-# under the terms of either the GPL or the LGPL, and not to allow others to
-# use your version of this file under the terms of the MPL, indicate your
-# decision by deleting the provisions above and replace them with the notice
-# and other provisions required by the GPL or the LGPL. If you do not delete
-# the provisions above, a recipient may use your version of this file under
-# the terms of any one of the MPL, the GPL or the LGPL.
-#
-# ***** END LICENSE BLOCK *****
-
-DEPTH		= ../../../..
-topsrcdir	= @top_srcdir@
-srcdir		= @srcdir@
-VPATH		= @srcdir@
-
-include $(DEPTH)/config/autoconf.mk
-
-include $(topsrcdir)/config/rules.mk
-
-
diff --git a/mail/base/content/unix/platformMailOverlay.xul b/mail/base/content/unix/platformMailOverlay.xul
deleted file mode 100644
index c100c87ef5dd..000000000000
--- a/mail/base/content/unix/platformMailOverlay.xul
+++ /dev/null
@@ -1,7 +0,0 @@
-<?xml version="1.0"?> 
-<!-- unix version of platformMailOverlay.xul -->
-
-<overlay id="platformMailOverlay"
-         xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
-
-</overlay>
diff --git a/mail/base/content/unix/platformMailnewsOverlay.xul b/mail/base/content/unix/platformMailnewsOverlay.xul
deleted file mode 100644
index 2b319e18464c..000000000000
--- a/mail/base/content/unix/platformMailnewsOverlay.xul
+++ /dev/null
@@ -1,11 +0,0 @@
-<?xml version="1.0"?> 
-<!-- unix version of platformMailnewsOverlay.xul -->
-
-<overlay id="platformMailnewsOverlay"
-         xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
-
-	<!-- Delete Key -->
-	<key id="key_shiftDelete" keycode="VK_DELETE" modifiers="shift" command="cmd_shiftDelete"/>	
-
-</overlay>	
-
diff --git a/mail/base/content/win/platformMailOverlay.xul b/mail/base/content/win/platformMailOverlay.xul
deleted file mode 100644
index dfd974b2e933..000000000000
--- a/mail/base/content/win/platformMailOverlay.xul
+++ /dev/null
@@ -1,7 +0,0 @@
-<?xml version="1.0"?> 
-<!-- windows version of platformMailOverlay.xul -->
-
-<overlay id="platformMailOverlay"
-         xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
-
-</overlay>
diff --git a/mail/base/content/win/platformMailnewsOverlay.xul b/mail/base/content/win/platformMailnewsOverlay.xul
deleted file mode 100644
index cbd52d883c7f..000000000000
--- a/mail/base/content/win/platformMailnewsOverlay.xul
+++ /dev/null
@@ -1,10 +0,0 @@
-<?xml version="1.0"?> 
-<!-- win version of platformMailnewsOverlay.xul -->
-
-<overlay id="platformMailnewsOverlay"
-         xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
-
-	<!-- Delete Key -->
-	<key id="key_shiftDelete" keycode="VK_DELETE" modifiers="shift" command="cmd_shiftDelete"/>
-
-</overlay>