remove synchronized from fakeNorms (private & always called within sync context)

git-svn-id: https://svn.apache.org/repos/asf/lucene/java/trunk@329523 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/lucene/index/MultiReader.java

@@ -153,7 +153,7 @@ public class MultiReader extends IndexReader {
   }
 
   private byte[] ones;
-  private synchronized byte[] fakeNorms() {
+  private byte[] fakeNorms() {
     if (ones==null) ones=SegmentReader.createFakeNorms(maxDoc());
     return ones;
   }

src/java/org/apache/lucene/index/SegmentReader.java

@@ -450,7 +450,7 @@ class SegmentReader extends IndexReader {
   }
 
   private byte[] ones;
-  private synchronized byte[] fakeNorms() {
+  private byte[] fakeNorms() {
     if (ones==null) ones=createFakeNorms(maxDoc());
     return ones;
   }