refactor: removed dead code

Author: stevebillings

src/main/java/com/synopsys/integration/blackduck/imageinspector/image/oci/OciImageConfigParser.java

@@ -9,15 +9,12 @@
 
 import java.io.File;
 import java.io.IOException;
-import java.util.ArrayList;
 import java.util.LinkedList;
 import java.util.List;
-import java.util.Optional;
 import java.util.stream.Collectors;
 
 import com.synopsys.integration.blackduck.imageinspector.api.name.ImageNameResolver;
 import com.synopsys.integration.blackduck.imageinspector.image.common.*;
-import org.apache.commons.lang3.StringUtils;
 import org.jetbrains.annotations.Nullable;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;