chore: remove unused file

This was forgotten in the ps plugin rewrite.

plugins/ps/internal-functions

@@ -1,57 +0,0 @@
-#!/usr/bin/env bash
-source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
-source "$PLUGIN_AVAILABLE_PATH/docker-options/functions"
-source "$PLUGIN_AVAILABLE_PATH/config/functions"
-source "$PLUGIN_AVAILABLE_PATH/ps/functions"
-set -eo pipefail
-[[ $DOKKU_TRACE ]] && set -x
-
-fn-ps-parallel-cmd() {
-  declare desc="Run a ps command against all apps"
-  declare CMD="$1"
-  local GNU_PARALLEL has_apps=false
-
-  for APP in $(dokku_apps); do
-    has_apps=true
-    break
-  done
-
-  if [[ "$has_apps" == "false" ]]; then
-    dokku_log_info1 "No apps detected"
-    return
-  fi
-
-  if which parallel >/dev/null 2>&1; then
-    dokku_log_info1 "Running 'dokku ps:${CMD}' in parallel"
-    GNU_PARALLEL=$(parallel -V 2>&1 | grep GNU || true)
-    if [[ -z "$GNU_PARALLEL" ]]; then
-      # shellcheck disable=SC2046
-      parallel $DOKKU_PARALLEL_ARGUMENTS -i bash -c "dokku ps:${CMD} {}" -- $(dokku_apps)
-    else
-      # shellcheck disable=SC2046
-      dokku_apps | parallel $DOKKU_PARALLEL_ARGUMENTS "dokku ps:${CMD} {}"
-    fi
-    return
-  fi
-
-  dokku_log_info1 "Running 'dokku ps:${CMD}' in serially"
-  for APP in $(dokku_apps); do
-    if ! (is_deployed "$APP"); then
-      dokku_log_warn "App $APP has not been deployed"
-      continue
-    fi
-
-    if [[ "$CMD" == "restore" ]]; then
-      local DOKKU_APP_RESTORE=$(config_get "$APP" DOKKU_APP_RESTORE || true)
-      if [[ "$DOKKU_APP_RESTORE" == 0 ]]; then
-        continue
-      fi
-    fi
-
-    dokku_log_verbose "Running 'dokku ps:${CMD} $APP' ..."
-    if ps_${CMD} "$APP"; then
-      continue
-    fi
-    dokku_log_warn "dokku ps:${CMD} $APP failed"
-  done
-}