CSV::Parser#skip_needless_lines

# File tmp/rubies/ruby-3.1.3/lib/csv/parser.rb, line 893
def skip_needless_lines
  return unless @skip_lines

  until @scanner.eos?
    @scanner.keep_start
    line = @scanner.scan_all(@not_line_end) || "".encode(@encoding)
    line << @row_separator if parse_row_end
    if skip_line?(line)
      @lineno += 1
      @scanner.keep_drop
    else
      @scanner.keep_back
      return
    end
  end
end