Remove superfluous 'usage' declaration
Remove superfluous 'version' declaration
Remove superfluous 'parse_number_of_columns' declaration
Remove superfluous 'parse_size' declaration
Remove superfluous 'init' declaration
Remove superfluous 'generate_number_of_columns' declaration
Remove superfluous 'generate_column_types' declaration
Remove superfluous 'write_rows' declaration
Remove superfluous 'write_row' declaration
Remove superfluous 'write_field' declaration
Remove superfluous 'write_number' declaration
Remove superfluous 'write_text' declaration
Remove superfluous 'generate_column_type' declaration
Remove superfluous 'xrand' declaration