Remove unused import (#1311)

Author: chiaramapellimt

gp2gp-translator/src/transformXmlToJson/java/uk/nhs/adaptors/pss/translator/TransformXmlToJsonApplication.java

@@ -18,13 +18,11 @@
 import java.io.BufferedWriter;
 import java.io.File;
 import java.io.FileWriter;
-import java.io.FilenameFilter;
 import java.io.IOException;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
-import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 import java.util.stream.Collectors;