Fix compilation broken by 875fc8e8

I had fixed this locally in the previous change but forgot to push the
new patch set.

Change-Id: I1e5469bf2655edf3d39baf218f4a6d2f7a35498c
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/git/MergeOp.java b/gerrit-server/src/main/java/com/google/gerrit/server/git/MergeOp.java
index dbfd97e..8acbcd3 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/git/MergeOp.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/git/MergeOp.java
@@ -460,8 +460,7 @@
           }
         }
       }
-      logDebug("Opened branch {}: {}, (parsed to {})",
-          destBranch.get(), oldRef, branchTip);
+      logDebug("Opened branch {}: {}", destBranch.get(), branchTip);
       return branchUpdate;
     } catch (IOException e) {
       throw new MergeException("Cannot open branch", e);