Unset path_file after use

modules/environment/init.zsh

@@ -22,7 +22,7 @@ unsetopt BG_NICE          # Don't run all background jobs at a lower priority.
 unsetopt HUP              # Don't kill jobs on shell exit.
 unsetopt CHECK_JOBS       # Don't report on jobs when shell exit.
 
-# PATH
+# Paths
 typeset -gU cdpath fpath mailpath manpath path
 typeset -gUT INFOPATH infopath
 
@@ -46,6 +46,7 @@ manpath=(
 for path_file in /etc/manpaths.d/*(.N); do
   manpath+=($(<$path_file))
 done
+unset path_file
 
 path=(
   /usr/local/{bin,sbin}
@@ -57,6 +58,7 @@ path=(
 for path_file in /etc/paths.d/*(.N); do
   path+=($(<$path_file))
 done
+unset path_file
 
 # Language
 if [[ -z "$LANG" ]]; then