Remove unused variables from config

src/config.cpp

@@ -10,9 +10,6 @@ namespace config {
     uint32_t ring_buffer_read_retry_interval = 5;
     
     // H5 config.
-    std::string dataset_name = "data";
     hsize_t dataset_increase_step = 1000;
     hsize_t initial_dataset_size = 1000;
-    H5::PredType dataset_type = H5::PredType::NATIVE_UINT8;
-    H5T_order_t dataset_byte_order = H5T_ORDER_LE;
 }