fix: correct MAX_PAGE_NUM calculation

Author: CactiFromDesert

deps/3rd/jsoncpp

@@ -73,7 +73,6 @@ struct BPFileHeader
    */
   static const int MAX_PAGE_NUM =
       (BP_PAGE_DATA_SIZE - sizeof(buffer_pool_id) - sizeof(page_count) - sizeof(allocated_pages)) * 8;
-
   string to_string() const;
 };
 
@@ -352,5 +351,5 @@ class BufferPoolManager final
   common::Mutex                            lock_;
   unordered_map<string, DiskBufferPool *>  buffer_pools_;
   unordered_map<int32_t, DiskBufferPool *> id_to_buffer_pools_;
-  atomic<int32_t>                          next_buffer_pool_id_{1};  // 系统启动时，会打开所有的表，这样就可以知道当前系统最大的ID是多少了
+  atomic<int32_t>                          next_buffer_pool_id_{1};
 };

deps/3rd/libevent

@@ -25,7 +25,6 @@ static constexpr PageNum BP_HEADER_PAGE = 0;
 
 static constexpr const int BP_PAGE_SIZE      = (1 << 13);
 static constexpr const int BP_PAGE_DATA_SIZE = (BP_PAGE_SIZE - sizeof(LSN) - sizeof(CheckSum));
-
 /**
  * @brief 表示一个页面，可能放在内存或磁盘上
  * @ingroup BufferPool