Revert compdef change

This change breaks global completion.

argcomplete/bash_completion.d/_python-argcomplete

@@ -138,6 +138,12 @@ _python_argcomplete_global() {
         req_argv=( "" "${COMP_WORDS[@]:1}" )
         __python_argcomplete_expand_tilde_by_ref executable
     else
+        if [[ "$service" != "-default-" ]]; then
+            # TODO: this may not be sufficient - see https://zsh.sourceforge.io/Doc/Release/Completion-System.html
+            # May need to call _complete with avoid-completer=_python-argcomplete or something like that
+            _default
+            return
+        fi
         executable="${words[1]}"
         req_argv=( "${words[@]:1}" )
     fi
@@ -237,8 +243,5 @@ if [[ -z "${ZSH_VERSION-}" ]]; then
     complete -o default -o bashdefault -D -F _python_argcomplete_global
 else
     autoload is-at-least
-    # Replace only the default completer (_default).
-    # There are many other special contexts we don't want to override.
-    # https://zsh.sourceforge.io/Doc/Release/Completion-System.html
-    compdef _python_argcomplete_global -default-
+    compdef _python_argcomplete_global -P '*'
 fi