Fix cpplint readability/braces issues

Change-Id: I56b88956510077b0e13aad4caee8898313fab55b
diff --git a/compiler/dex/arena_allocator.h b/compiler/dex/arena_allocator.h
index cd2141a..3bd733e 100644
--- a/compiler/dex/arena_allocator.h
+++ b/compiler/dex/arena_allocator.h
@@ -83,7 +83,7 @@
      void Dump(std::ostream& os) const {
        arena_.DumpMemStats(os);
      }
-     explicit MemStats(const ArenaAllocator &arena) : arena_(arena) {};
+     explicit MemStats(const ArenaAllocator &arena) : arena_(arena) {}
   private:
     const ArenaAllocator &arena_;
 }; // MemStats