The board shall not remove the name of any elector, known by any member of the board, or made known to the board by another qualified elector, or duly representative of the elector whose name is to be stricken, to be a legal resident of the county not known to be suffering from any disqualification. In purging the list of qualified electors, the board of registrars shall remove only the names of those persons who have not reidentified in the manner prescribed herein.