A Familiar Mural Finds Itself Without a Wall
Giant modernist mural painted by Josef Albers, member of Bauhaus school, is removed from lobby of MetLife Building in midtown Manhattan, where it has been fixture since building's construction 37 years ago; sleek abstract work, entitled Manhattan, was painted by Albers on commission from Bauhaus colleague and building's architect Walter Gropius as homage to city to which he immigrated in 1933; MetLife officials say they have no intention of reinstalling it since it impedes efforts to draw in more light and make access more open; spokesman says company would like to find new home for work; says while it is not looking to sell painting, it would not refuse offer; some preservationists and Albers admirers score removal; photo (M)