Checkpoint: Removed unused imports

Signed-off-by: Marcin Woźniak <y0rune@aol.com>

buisnesslogic/src/main/java/com/plannaplan/entities/Exchange.java

@@ -1,6 +1,5 @@
 package com.plannaplan.entities;
 
-import java.sql.Date;
 import java.sql.Timestamp;
 
 import javax.persistence.Entity;