Revert "Add PSD for kiosk_next to feedback reports"

This reverts commit ffe0d075.

Reason for revert: Removing KioskNext: crbug.com/977019

Original change's description:
> Add PSD for kiosk_next to feedback reports
> 
> Bug: 966147
> Change-Id: I4306dd54fedd9d5e3015a1e1277671efc7a142c0
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1625897
> Auto-Submit: Michael Giuffrida <michaelpg@chromium.org>
> Reviewed-by: Zachary Kuznia <zork@chromium.org>
> Commit-Queue: Michael Giuffrida <michaelpg@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#663205}

TBR=zork@chromium.org,michaelpg@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 966147,977019
Change-Id: I07a9258affb777f3950f4d8f9c4b36c545fb08f2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1679173Reviewed-by: Michael Giuffrida <michaelpg@chromium.org>
Commit-Queue: Michael Giuffrida <michaelpg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#672760}

chrome/browser/feedback/system_logs/log_sources/chrome_internal_log_source.cc

@@ -36,7 +36,6 @@
 #include "chrome/browser/chromeos/arc/arc_util.h"
 #include "chrome/browser/chromeos/login/demo_mode/demo_session.h"
 #include "chrome/browser/metrics/chromeos_metrics_provider.h"
-#include "chrome/browser/ui/ash/kiosk_next_shell_client.h"
 #include "chromeos/dbus/util/version_loader.h"
 #include "chromeos/system/statistics_provider.h"
 #include "components/user_manager/user_manager.h"
@@ -68,7 +67,6 @@ constexpr char kArcStatusKey[] = "CHROMEOS_ARC_STATUS";
 constexpr char kMonitorInfoKey[] = "monitor_info";
 constexpr char kAccountTypeKey[] = "account_type";
 constexpr char kDemoModeConfigKey[] = "demo_mode_config";
-constexpr char kKioskNextKey[] = "kiosk_next";
 #else
 constexpr char kOsVersionTag[] = "OS VERSION";
 #endif
@@ -247,11 +245,6 @@ void ChromeInternalLogSource::Fetch(SysLogsSourceCallback callback) {
   response->emplace(kDemoModeConfigKey,
                     chromeos::DemoSession::DemoConfigToString(
                         chromeos::DemoSession::GetDemoConfig()));
-  response->emplace(
-      kKioskNextKey,
-      KioskNextShellClient::Get() && KioskNextShellClient::Get()->has_launched()
-          ? "enabled"
-          : "disabled");
   PopulateLocalStateSettings(response.get());
 
   // Chain asynchronous fetchers: PopulateMonitorInfoAsync, PopulateEntriesAsync