Remove the gig alias

It escaped removal in 7b453c1.

modules/git/alias.zsh

@@ -67,7 +67,6 @@ alias gir='git reset'
 alias giR='git reset --keep'
 alias gix='git rm -r --cached'
 alias giX='git rm -rf --cached'
-alias gig='git grep --cached'
 
 # Konflict (k)
 alias gkl='git status | sed -n "s/^.*both [a-z]*ed: *//p"'