It is hereby declared to be the intention of the Town Commissioners that the sections, paragraphs, sentences, clauses, and phrases of this chapter are severable. If any such section, paragraph, sentence, clause, or phrase is declared unconstitutional or otherwise invalid by any court of competent jurisdiction in a valid judgment or decree, such unconstitutionality or invalidity shall not affect any of the remaining sections, paragraphs, sentences, clauses, or phrases of this zoning chapter since the same would have been enacted without the incorporation into this zoning chapter of such unconstitutional or invalid sections, paragraphs, sentences, clauses, or phrases.