[errorprone] Remove unnecessary parentheses

See https://errorprone.info/bugpattern/UnnecessaryParentheses

Change-Id: I958a608bf51a74ee0f24d2016f09d5d800eb0ba1

java/com/google/gitiles/CommitSoyData.java

diff --git a/java/com/google/gitiles/CommitSoyData.java b/java/com/google/gitiles/CommitSoyData.java
index ac81f80..e3e5e2b 100644
--- a/java/com/google/gitiles/CommitSoyData.java
+++ b/java/com/google/gitiles/CommitSoyData.java
@@ -185,7 +185,7 @@
       if (parents.size() == 1) {
         parentName = view.getRevision().getName() + "^";
       } else {
-        parentName = view.getRevision().getName() + "^" + (i++);
+        parentName = view.getRevision().getName() + "^" + i++;
       }
       diff.setOldRevision(parentName, parent);
 

java/com/google/gitiles/doc/TocFormatter.java

diff --git a/java/com/google/gitiles/doc/TocFormatter.java b/java/com/google/gitiles/doc/TocFormatter.java
index 297794d..e45f37f 100644
--- a/java/com/google/gitiles/doc/TocFormatter.java
+++ b/java/com/google/gitiles/doc/TocFormatter.java
@@ -203,7 +203,7 @@
       } else {
         int i = 1;
         for (TocEntry entry : headers) {
-          ids.put(entry.header, entry.id + "-" + (i++));
+          ids.put(entry.header, entry.id + "-" + i++);
         }
       }
     }