remove unused import

Author: Vladimir Kotal

opengrok-indexer/src/main/java/org/opengrok/indexer/configuration/RuntimeEnvironment.java

@@ -29,7 +29,6 @@
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.nio.file.Path;
-import java.security.InvalidParameterException;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;