icewm: migrate to by-name

-2
pkgs/applications/window-managers/icewm/default.nix pkgs/by-name/ic/icewm/package.nix
-2
pkgs/top-level/all-packages.nix
··· 32932 32932 32933 32933 ical2orgpy = callPackage ../tools/misc/ical2orgpy { }; 32934 32934 32935 - icewm = callPackage ../applications/window-managers/icewm { }; 32936 - 32937 32935 icon-library = callPackage ../applications/graphics/icon-library { }; 32938 32936 32939 32937 id3v2 = callPackage ../applications/audio/id3v2 { };