Removed unused imports from QuickTour

Author: jyemin

driver/src/examples/tour/QuickTour.java

@@ -19,7 +19,6 @@
 import com.mongodb.Block;
 import com.mongodb.MongoClient;
 import com.mongodb.MongoClientURI;
-import com.mongodb.client.FindIterable;
 import com.mongodb.client.MongoCollection;
 import com.mongodb.client.MongoCursor;
 import com.mongodb.client.MongoDatabase;
@@ -33,15 +32,13 @@
 
 import java.util.ArrayList;
 import java.util.List;
-import java.util.concurrent.TimeUnit;
 
 import static com.mongodb.client.model.Filters.and;
 import static com.mongodb.client.model.Filters.eq;
 import static com.mongodb.client.model.Filters.exists;
 import static com.mongodb.client.model.Filters.gt;
 import static com.mongodb.client.model.Filters.lte;
 import static com.mongodb.client.model.Projections.excludeId;
-import static com.mongodb.client.model.Sorts.ascending;
 import static com.mongodb.client.model.Sorts.descending;
 
 /**