cleanup imports

git-svn-id: https://svn.code.sf.net/p/jackcess/code/jackcess/trunk@710 f203690c-595d-4dc9-a70b-905162fa7fd2

src/java/com/healthmarketscience/jackcess/Column.java

@@ -47,7 +47,6 @@ import java.util.Calendar;
 import java.util.Date;
 import java.util.List;
 import java.util.Map;
-import java.util.TimeZone;
 import java.util.UUID;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;