ConversionUtilsTest: remove unused imports

Author: ctrueden

src/test/java/org/scijava/util/ConversionUtilsTest.java

@@ -39,15 +39,10 @@
 import static org.junit.Assert.assertSame;
 import static org.junit.Assert.assertTrue;
 
-import java.math.BigDecimal;
-import java.math.BigInteger;
 import java.util.ArrayList;
 import java.util.Collection;
-import java.util.HashMap;
 import java.util.HashSet;
-import java.util.LinkedList;
 import java.util.List;
-import java.util.Map;
 import java.util.Random;
 import java.util.Set;