bridges: remove unused .map file

Change-Id: Id6e11cef2bdffd6726ac00f9a30e84cf44efe71e

bridges/source/bridge_exports.map

-#
-# This file is part of the LibreOffice project.
-#
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-#
-# This file incorporates work covered by the following license notice:
-#
-#   Licensed to the Apache Software Foundation (ASF) under one or more
-#   contributor license agreements. See the NOTICE file distributed
-#   with this work for additional information regarding copyright
-#   ownership. The ASF licenses this file to you under the Apache
-#   License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
-#
-
-UDK_3_0_0 {
-    global:
-        component_canUnload;
-        uno_initEnvironment;
-        uno_ext_getMapping;
-    local:
-    *;
-};