Remove unused import
diff --git a/lucene/core/src/java/org/apache/lucene/index/IndexWriter.java b/lucene/core/src/java/org/apache/lucene/index/IndexWriter.java
index 7d4e941..00632ca 100644
--- a/lucene/core/src/java/org/apache/lucene/index/IndexWriter.java
+++ b/lucene/core/src/java/org/apache/lucene/index/IndexWriter.java
@@ -33,7 +33,6 @@
import java.util.PriorityQueue;
import java.util.Queue;
import java.util.Set;
-import java.util.concurrent.ConcurrentSkipListSet;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;
@@ -85,7 +84,7 @@
even while readers are using the index. The old readers will
continue to search the "point in time" snapshot they had opened,
and won't see the newly created index until they re-open. If
- {@link OpenMode#CREATE_OR_APPEND} is used IndexWriter will create a
+ {@link OpenMode#CREATE_OR_APPEND} is used IndexWriter will create a
new index if there is not already an index at the provided path
and otherwise open the existing index.</p>
