Revert "zsh: skip repeat Python runs in the same completion run"

This reverts commit 0d55af2.

This commit introduced the following regression:

> mkdir testdir
> touch testdir/FOO
> autoload -U compinit
> compinit
> zstyle ':completion:*' matcher-list '' 'm:{a-zA-Z}={A-Za-z}'
> : testdir/f<TAB>

Expected: testdir/FOO
Observed: no completions

Author: kislyuk

argcomplete/bash_completion.d/_python-argcomplete

@@ -124,12 +124,6 @@ __python_argcomplete_which() {
 _python_argcomplete_global() {
 
     if [[ -n "${ZSH_VERSION-}" ]]; then
-        if [[ "${_matcher_num-}" -gt 1 ]]; then
-            # Return early if the completer is called multiple times in the same completion run.
-            # Currently the only known occurrence of this is in zsh when a matcher-list zstyle is declared.
-            # When this happens, _matcher_num is incremented past 1.
-            return
-        fi
         # Store result of a regex match in the
         # BASH_REMATCH variable rather than MATCH
         setopt local_options BASH_REMATCH

argcomplete/shell_integration.py

@@ -34,12 +34,6 @@
     local IFS=$'\013'
     local script="%(argcomplete_script)s"
     if [[ -n "${ZSH_VERSION-}" ]]; then
-        if [[ "${_matcher_num-}" -gt 1 ]]; then
-            # Return early if the completer is called multiple times in the same completion run.
-            # Currently the only known occurrence of this is in zsh when a matcher-list zstyle is declared.
-            # When this happens, _matcher_num is incremented past 1.
-            return
-        fi
         local completions
         completions=($(IFS="$IFS" \
             COMP_LINE="$BUFFER" \