fish: Drop all usages of vgrep

While we have been using vgrep for quite a while it has become
increasingly annoying since it uses a global cache instead of
a different cache for each directory which means using vgrep
to search across different directories at the same time is
absolutely useless.

fish/.config/fish/conf.d/vgrep-abbr.fish

@@ -1,7 +0,0 @@
-abbr vg vgrep
-abbr vs vgrep -s
-abbr vgi vgrep --interactive
-abbr vgng vgrep --no-git
-abbr vgnr vgrep --no-ripgrep
-abbr vgnh vgrep --no-header
-abbr vgnl vgrep --no-less

fish/.config/fish/functions/vgF.fish

@@ -1,4 +0,0 @@
-function vgF --wraps=vgrep --description 'vgrep search with fzf'
-    set -f INITIAL_QUERY $argv[1]
-    FZF_DEFAULT_COMMAND="vgrep --no-header $INITIAL_QUERY" fzf --bind "Ctrl-d:half-page-down,Ctrl-u:half-page-up,change:reload:vgrep --no-header {q} || true" --ansi --phony --tac --query $INITIAL_QUERY | awk '{print $1}' | xargs -I{} -o vgrep --show {}
-end

fish/.config/fish/functions/vgf.fish

@@ -1,4 +0,0 @@
-function vgf --wraps=vgrep --description 'vgrep search with fzf'
-    set -f INITIAL_QUERY $argv[1]
-    vgrep --no-header $INITIAL_QUERY | fzf --ansi --bind "Ctrl-d:half-page-down,Ctrl-u:half-page-up" | awk '{print $1}' | xargs -I{} -o vgrep --show {}
-end