Fixes #961 - Remove unused + deprecated Exception

jme3-core/src/plugins/java/com/jme3/font/plugins/BitmapFontLoader.java

@@ -43,7 +43,6 @@ import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
-import org.omg.PortableInterceptor.SYSTEM_EXCEPTION;
 
 public class BitmapFontLoader implements AssetLoader {