Revert "Add theme Eventually"

This reverts commit ee62a5b.

The demo links to a NextJS agency site.

Author: bep

themes.txt

@@ -406,7 +406,6 @@ github.com/rullmann/hugo-theme-terminal-cookbook
 github.com/runningstream/hugograyscale
 github.com/rz3n/hugo-theme-freshstart
 github.com/s4n7h0/hugo-theme-timeline
-github.com/sagarmusabbir/Eventually
 github.com/saadnpq/npq-hugo
 github.com/saey55/hugo-elate-theme
 github.com/SAGGameDeveloper/hugo-minimalist-spa