Remove rose-pine/pure plugin, now handled by rose-pine/fish

Pure prompt colors are now reactively applied via --on-variable handlers
in the rose-pine/fish conf.d integration. No manual rose_pine_pure call
needed.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: simono

fish/conf.d/theme.fish

@@ -20,9 +20,6 @@ function __so_apply_theme --on-variable fish_terminal_color_theme
         set -f theme_variant dawn
     end
 
-    # Pure prompt colors
-    rose_pine_pure $theme_variant
-
     # Bat and delta both use `BAT_THEME`.
     set -gx BAT_THEME "rose-pine-$theme_variant"
 

fish/fish_plugins

@@ -3,4 +3,3 @@ pure-fish/pure
 jorgebucaran/autopair.fish
 jorgebucaran/nvm.fish
 rose-pine/fish
-rose-pine/pure