RevisionParserTest: Remove assignment to unused variable

Change-Id: I4dab2501b1c13afd265970c8a98dba47d8e5c9aa

javatests/com/google/gitiles/RevisionParserTest.java

diff --git a/javatests/com/google/gitiles/RevisionParserTest.java b/javatests/com/google/gitiles/RevisionParserTest.java
index 80781aa..b2c88ea 100644
--- a/javatests/com/google/gitiles/RevisionParserTest.java
+++ b/javatests/com/google/gitiles/RevisionParserTest.java
@@ -258,7 +258,7 @@
   @Test
   public void parseEmailInRevision() throws Exception {
     RevCommit c = repo.commit().create();
-    RevCommit experimental = repo.update("refs/experimental/author@example.com/foo", c);
+    repo.update("refs/experimental/author@example.com/foo", c);
     assertThat(parser.parse("refs/experimental/author@example.com/foo"))
         .isEqualTo(new Result(Revision.peeled("refs/experimental/author@example.com/foo", c)));
   }