Remove unused import only

Author: rbygrave

ebean-datasource/src/main/java/io/ebean/datasource/pool/ConnectionPool.java

@@ -8,7 +8,6 @@
 import java.util.*;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
-import java.util.concurrent.ThreadPoolExecutor;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicInteger;