zsh: Remove path deduplication

Aside from some more needed things, the path deduplication function is
the most time-consuming invocation on zsh startup, taking almost
100ms on my system.

Perhaps it would be reasonable to re-introduce when the first invocation
from path is occurring but it is simply too much time taken for each
time I start a new shell instance for now.

terminal/.config/zsh/.zshrc

@@ -192,14 +192,6 @@ get_var() {
 set_var() {
     eval "$1=\"\$2\""
 }
-dedup_pathvar() {
-    pathvar_name="$1"
-    pathvar_value="$(get_var "$pathvar_name")"
-    deduped_path="$(perl -e 'print join(":",grep { not $seen{$_}++ } split(/:/, $ARGV[0]))' "$pathvar_value")"
-    set_var "$pathvar_name" "$deduped_path"
-}
-dedup_pathvar PATH
-dedup_pathvar MANPATH
 
 unset CONFDIR
 unset ZSHCONFDIR