update_maps shard_size is deprecated

[rguo123]

update_maps currently passes a shard_size parameter. Within the method, update_maps creates a progress bar based on shard_size and assumes it is a numeric value. However, when this value then gets passed to add_embeddings or add_text, shard_size is treated as deprecated and will raise a warning.

Hence, due to this conflict, the method does not work. The task to fix this is to remove shard_size option from update_maps.