Use cut instead of sed in the default command

src/constants_unix.go

@@ -4,5 +4,5 @@ package fzf
 
 const (
 	// Reader
-	defaultCommand = `find -L . -path '*/\.*' -prune -o -type f -print -o -type l -print 2> /dev/null | sed s/^..//`
+	defaultCommand = `find -L . -path '*/\.*' -prune -o -type f -print -o -type l -print 2> /dev/null | cut -b3-`
 )