rofi-snippets: remove the subshell and just use a pipe

i expect that this is faster, particularly because bash should stand up each section of the pipeline in parallel, right?

hosts/common/programs/rofi/rofi-snippets

@@ -4,7 +4,7 @@
 # "bookmarking"/snippets inspired by Luke Smith:
 # - <https://www.youtube.com/watch?v=d_11QaTlf1I>
 
-snippet=$(cat ~/.config/rofi-snippets/public.txt ~/.config/rofi-snippets/private.txt | \
+cat ~/.config/rofi-snippets/public.txt ~/.config/rofi-snippets/private.txt | \
   rofi -dmenu | \
-  sed 's/ #.*$//')
-wtype "$snippet"
+  sed -z -e 's/  *#.*$//' -e 's/\n$//' | \
+  wtype -