Only have single everforest theme

colors/default.nix

@@ -1,4 +1,4 @@
 {
   undefined = "#ff00ff";
   foreground-bright = "#ffffff";
-} // import ./everforest-medium.nix
+} // import ./everforest.nix

colors/everforest-medium.nix

@@ -1,8 +0,0 @@
-{
-  background = "#232a2e";
-  background-alt = "#2d353b";
-  foreground = "#d3c6aa";
-  primary = "#83c092";
-  alert = "#e67e80";
-  disabled = "#343f44";
-}