Remove unused import.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/csv/trunk@1469437 13f79535-47bb-0310-9956-ffa450edef68

Author: garydgregory

src/main/java/org/apache/commons/csv/CSVPrinter.java

@@ -19,7 +19,6 @@
 
 import static org.apache.commons.csv.Constants.COMMENT;
 import static org.apache.commons.csv.Constants.CR;
-import static org.apache.commons.csv.Constants.EMPTY;
 import static org.apache.commons.csv.Constants.LF;
 import static org.apache.commons.csv.Constants.SP;