Authorizing the revision of lines and grades on a portion of City Plan No. 107 of an area bounded by Fairmount avenue, Forty-fourth street, Haverford avenue and Forty-sixth street, by striking from the City Plan and vacating Melville place from Fairmount avenue to a dead-end southwardly, Lex street from Fairmount avenue to Melon place, and Melon place from Forty-fourth street to a dead-end westwardly; by striking from the City Plan and vacating the southernmost thirty-eight (38) feet wide portion of Fairmount avenue from a point eighty (80) feet east of Melville place to a point eighty (80) fe — Open Common Ground