Revert "unset chpwd_functions before running cd ... (#6830)"

This reverts commit 3dab7e46.

plugins/shrink-path/shrink-path.plugin.zsh

@@ -94,11 +94,6 @@ shrink_path () {
         (( tilde )) && dir=${dir/$HOME/\~}
         tree=(${(s:/:)dir})
         (
-                # unset chpwd_functions since we'll be calling `cd` and don't
-                # want any side-effects (eg., if the user was using auto-ls)
-                chpwd_functions=()
-                # unset chpwd since even if chpwd_functions is (), zsh will
-                # attempt to execute chpwd
                 unfunction chpwd 2> /dev/null
                 if [[ $tree[1] == \~* ]] {
                         cd ${~tree[1]}