Revert "Add kitty gruvbox theme in a separate file"

This reverts commit 793ca2e04e64714a0e6c31a7f09ce1740724a41c.

home-manager/common/software/cli/gruvbox/kitty-theme.nix

@@ -1,40 +0,0 @@
-{ ...  }: {
-  # Kitty theme
-  # https://github.com/dexpota/kitty-themes/tree/master
-  # Generated with the command `kitten `
-  home.file.".config/kitty/theme.conf".text = ''
-    ## name: Gruvbox Dark
-    ## author: Pavel Pertsev
-    ## license: MIT/X11
-    ## upstream: https://raw.githubusercontent.com/gruvbox-community/gruvbox-contrib/master/kitty/gruvbox-dark.conf
-
-    selection_foreground    #ebdbb2
-    selection_background    #d65d0e
-
-    background              #282828
-    foreground              #ebdbb2
-
-    color0                  #3c3836
-    color1                  #cc241d
-    color2                  #98971a
-    color3                  #d79921
-    color4                  #458588
-    color5                  #b16286
-    color6                  #689d6a
-    color7                  #a89984
-    color8                  #928374
-    color9                  #fb4934
-    color10                 #b8bb26
-    color11                 #fabd2f
-    color12                 #83a598
-    color13                 #d3869b
-    color14                 #8ec07c
-    color15                 #fbf1c7
-
-    cursor                  #bdae93
-    cursor_text_color       #665c54
-
-    url_color               #458588
-
-  '';
-}