Remove no longer used API warning filter for FileUtil

Change-Id: Ic13943139f23cdb1eac840417de43796236d578f
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit/.settings/.api_filters

@@ -1,10 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<component id="org.eclipse.jgit" version="2">
-    <resource path="src/org/eclipse/jgit/util/FileUtil.java" type="org.eclipse.jgit.util.FileUtil">
-        <filter comment="moved into another bundle keeping original package" id="1110441988">
-            <message_arguments>
-                <message_argument value="org.eclipse.jgit.util.FileUtil"/>
-            </message_arguments>
-        </filter>
-    </resource>
-</component>