remove unused import

Signed-off-by: Ceki Gulcu <[email protected]>

Author: ceki

logback-core/src/main/java/ch/qos/logback/core/net/HardenedObjectInputStream.java

@@ -18,7 +18,6 @@
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InvalidClassException;
-import java.io.ObjectInputFilter;
 import java.io.ObjectInputStream;
 import java.io.ObjectStreamClass;
 import java.lang.reflect.InvocationTargetException;