Remove automatic metadata flushing

lib/src/BufferedWriter.cpp

@@ -54,7 +54,6 @@ void BufferedWriter::write_metadata_to_file()
 
 void BufferedWriter::close_file() 
 {
-    write_metadata_to_file();
     H5Writer::close_file();
 }
 

lib/src/BufferedWriter.hpp

@@ -9,12 +9,13 @@ class BufferedWriter : public H5Writer
     size_t total_frames;
     std::unique_ptr<MetadataBuffer> metadata_buffer;
 
-    void write_metadata_to_file();
+    
 
     public:
         BufferedWriter(const std::string& filename, size_t total_frames, std::unique_ptr<MetadataBuffer>&& metadata_buffer, 
             hsize_t frames_per_file=0, hsize_t initial_dataset_size=1000, hsize_t dataset_increase_step=1000);
         void cache_metadata(std::string name, uint64_t frame_index, const char* data);
+        void write_metadata_to_file();
         virtual void close_file() override;
 };