Remove the old deprecated ApplicationIPCManager IPC mechanism

The unit tests that needed an IPC side channel have been updated to use
intents instead.

Change-Id: Ifbd82728557eadaea08425e9eacf2cbf8a08293e
Reviewed-by: Dominik Holland <dominik.holland@qt.io>

4 files changed, 43 insertions, 10 deletions

diff --git a/doc/index.qdoc b/doc/index.qdoc
index 440b7e92..a6d70c83 100644
--- a/doc/index.qdoc
+++ b/doc/index.qdoc
@@ -56,6 +56,7 @@ For a high-level overview, see \l{The Qt Application Manager}{Introduction to th
     \li \l{Single-Process vs. Multi-Process Mode}
     \li \l{Migrating code from 5.11 to 5.12}
     \li \l{Migrating code from 5.13 to 5.14}
+    \li \l{Migrating code from 5.15 to 6.2}
 \endlist
 
 \section1 Tools
diff --git a/doc/migration-guide-6.2.qdoc b/doc/migration-guide-6.2.qdoc
new file mode 100644
index 00000000..67eb9e74
--- /dev/null
+++ b/doc/migration-guide-6.2.qdoc
@@ -0,0 +1,38 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:FDL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Free Documentation License Usage
+** Alternatively, this file may be used under the terms of the GNU Free
+** Documentation License version 1.3 as published by the Free Software
+** Foundation and appearing in the file included in the packaging of
+** this file. Please review the following information to ensure
+** the GNU Free Documentation License version 1.3 requirements
+** will be met: https://www.gnu.org/licenses/fdl-1.3.html.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*!
+
+\page migration-guide-6.2.html
+\title Migrating code from 5.15 to 6.2
+
+Qt Application Manager 6.2 added no new APIs, but switched the build system from qmake to cmake and
+finally removed the deprecated legacy \c ApplicationInterfaceExtension IPC mechanism.
+A direct replacement for the old IPC had been added in 5.14 already in form of the new \l{Intents}
+mechanism.
+
+*/
diff --git a/doc/singlevsmultiprocess.qdoc b/doc/singlevsmultiprocess.qdoc
index da8b5fef..027fa58e 100644
--- a/doc/singlevsmultiprocess.qdoc
+++ b/doc/singlevsmultiprocess.qdoc
@@ -211,13 +211,8 @@ stopped. The QML engine doesn't allow you to unload parts of the object hierarch
 If your application needs to support both, single-process mode and multi-process mode, you must
 define a set of Inter-Process Communication (IPC) interfaces between the application and System UI,
 and always stick to them. Consider making these interfaces part of your review policy. While you
-can use any IPC mechanism that suits your use case, the application manager includes an IPC
-mechanism that fully abstracts the single-process vs. multi-process difference. This mechanism
-also makes it easy to create new interfaces for QML developers.
-
-Be aware that the application manager's IPC is not suitable to interface your entire middleware.
-Its sole purpose is to avoid a situation where there is a large number of one-off daemons that need
-to be kept track of, involving various pieces of state information that need to be shared between
-the System UI and some or all applications.
+can use any IPC mechanism that suits your use case, the application manager includes an \l{Intents}
+based IPC mechanism that fully abstracts the single-process vs. multi-process difference. This
+mechanism also makes it easy to create new interfaces for QML developers.
 
 */
diff --git a/doc/systemui.qdoc b/doc/systemui.qdoc
index 91da364b..f0698618 100644
--- a/doc/systemui.qdoc
+++ b/doc/systemui.qdoc
@@ -143,8 +143,7 @@ side. The application should do all the necessary clean-ups and then confirm tha
 terminates with \l{ApplicationInterface::acknowledgeQuit()}.
 
 You can implement other life-cycle management features that are tailored to the specific
-requirements of IPC mechanisms like window properties, \l{ApplicationInterfaceExtension},
-or proprietary IPCs.
+requirements of IPC mechanisms like window properties, \l{Intents}, or proprietary IPCs.
 
 For more information, see the \l{Desktop System UI Example}.