Revert "poky: subtree update:b23aa6b753..ad30a6d470"

This reverts commit af5e4ef732faedf66c6dc1756432e9de2ac72988.

This commit introduced openbmc/openbmc#3720 and no solution has been
forthcoming. Revert until we can get to the bottom of this.

Change-Id: I2fb0d81eb26cf3dadb2f2abdd1a1bb7a95eaf03c
diff --git a/poky/documentation/dev-manual/dev-manual-intro.xml b/poky/documentation/dev-manual/dev-manual-intro.xml
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+<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
+"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"
+[<!ENTITY % poky SYSTEM "../poky.ent"> %poky; ] >
+<!--SPDX-License-Identifier: CC-BY-2.0-UK-->
+
+<chapter id='dev-manual-intro'>
+
+<title>The Yocto Project Development Tasks Manual</title>
+    <section id='dev-welcome'>
+        <title>Welcome</title>
+
+        <para>
+            Welcome to the Yocto Project Development Tasks Manual!
+            This manual provides relevant procedures necessary for developing
+            in the Yocto Project environment (i.e. developing embedded Linux
+            images and user-space applications that run on targeted devices).
+            The manual groups related procedures into higher-level sections.
+            Procedures can consist of high-level steps or low-level steps
+            depending on the topic.
+        </para>
+
+        <para>
+            This manual provides the following:
+            <itemizedlist>
+                <listitem><para>
+                    Procedures that help you get going with the Yocto Project.
+                    For example, procedures that show you how to set up
+                    a build host and work with the Yocto Project
+                    source repositories.
+                    </para></listitem>
+                <listitem><para>
+                    Procedures that show you how to submit changes to the
+                    Yocto Project.
+                    Changes can be improvements, new features, or bug
+                    fixes.
+                    </para></listitem>
+                <listitem><para>
+                    Procedures related to "everyday" tasks you perform while
+                    developing images and applications using the Yocto
+                    Project.
+                    For example, procedures to create a layer, customize an
+                    image, write a new recipe, and so forth.
+                    </para></listitem>
+            </itemizedlist>
+        </para>
+
+        <para>
+            This manual does not provide the following:
+            <itemizedlist>
+                <listitem><para>
+                    Redundant Step-by-step Instructions:
+                    For example, the
+                    <ulink url='&YOCTO_DOCS_SDK_URL;'>Yocto Project Application Development and the Extensible Software Development Kit (eSDK)</ulink>
+                    manual contains detailed instructions on how to install an
+                    SDK, which is used to develop applications for target
+                    hardware.
+                    </para></listitem>
+                <listitem><para>
+                    Reference or Conceptual Material:
+                    This type of material resides in an appropriate reference
+                    manual.
+                    For example, system variables are documented in the
+                    <ulink url='&YOCTO_DOCS_REF_URL;'>Yocto Project Reference Manual</ulink>.
+                    </para></listitem>
+                <listitem><para>
+                    Detailed Public Information Not Specific to the
+                    Yocto Project:
+                    For example, exhaustive information on how to use the
+                    Source Control Manager Git is better covered with Internet
+                    searches and official Git Documentation than through the
+                    Yocto Project documentation.
+                    </para></listitem>
+            </itemizedlist>
+        </para>
+    </section>
+
+    <section id='other-information'>
+        <title>Other Information</title>
+
+        <para>
+            Because this manual presents information for many different
+            topics, supplemental information is recommended for full
+            comprehension.
+            For introductory information on the Yocto Project, see the
+            <ulink url='&YOCTO_HOME_URL;'>Yocto Project Website</ulink>.
+            If you want to build an image with no knowledge of Yocto Project
+            as a way of quickly testing it out, see the
+            <ulink url='&YOCTO_DOCS_BRIEF_URL;'>Yocto Project Quick Build</ulink>
+            document.
+        </para>
+
+        <para>
+            For a comprehensive list of links and other documentation, see the
+            "<ulink url='&YOCTO_DOCS_REF_URL;#resources-links-and-related-documentation'>Links and Related Documentation</ulink>"
+            section in the Yocto Project Reference Manual.
+        </para>
+
+        <para>
+        </para>
+    </section>
+</chapter>
+<!--
+vim: expandtab tw=80 ts=4
+-->