remove cosmic-epoch

recipes/wip/cosmic-epoch/recipe.toml

-#TODO missing script for "just", see https://github.com/pop-os/cosmic-epoch#testing
-#TODO Dependencies will change after alpha?
-[source]
-git = "https://github.com/pop-os/cosmic-epoch"
-[build]
-template = "custom"
-dependencies = [
-    "mesa",
-    "freetype2",
-    "fontconfig",
-    "expat",
-    "dbus",
-    "gtk4",
-    "seatd",
-    "eudev3",
-    "libinput",
-    "libwayland",
-    "libxkbcommon",
-    "pipewire",
-]