clean up and EAPI=5 version bump
x11-themes/e-gtk-theme: update
x11-themes/elementary-gtk-theme: update
removed x11-themes/mire-gtk-theme
re clean up
x11-themes/delorean-gtk-theme: update
removed x11-themes/elegant-brit-gtk-theme
x11-themes/insignificant-gtk-theme
x11-themes/valium-gtk-theme
removed x11-themes/gtk-engines-equinox
x11-themes/delorean-gtk-theme: update
metadata: update