VisibilityChecker: Remove unnecessary suppression of 'unused'

Change-Id: I08d826bf33b63778d583dffdec926d41eb8be01e

java/com/google/gitiles/VisibilityChecker.java

diff --git a/java/com/google/gitiles/VisibilityChecker.java b/java/com/google/gitiles/VisibilityChecker.java
index ad6c88b..e98377d 100644
--- a/java/com/google/gitiles/VisibilityChecker.java
+++ b/java/com/google/gitiles/VisibilityChecker.java
@@ -103,7 +103,7 @@
    * @throws IOException a pack file or loose object could not be read
    */
   protected boolean isReachableFrom(
-      @SuppressWarnings("unused") String description,
+      String description,
       RevWalk walk,
       RevCommit commit,
       Collection<ObjectId> starters)