Remove all mention of core-image-lsb

core-image-lsb was removed in 2019[1], so remove all of the  incredibly
obsolete references in the documentation.

[1] oe-core fb064356af615d67d85b65942103bf943d84d290

(From yocto-docs rev: 062445a49919eff117b5478c1fb18d125c1f895c)

Signed-off-by: Ross Burton <ross.burton@arm.com>
Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de>
Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/dev-manual/customizing-images.rst

@@ -79,15 +79,14 @@ recipe that are enabled with :term:`IMAGE_FEATURES`. The value of
 :term:`EXTRA_IMAGE_FEATURES` is added to :term:`IMAGE_FEATURES` within
 ``meta/conf/bitbake.conf``.
 
-To illustrate how you can use these variables to modify your image,
-consider an example that selects the SSH server. The Yocto Project ships
-with two SSH servers you can use with your images: Dropbear and OpenSSH.
-Dropbear is a minimal SSH server appropriate for resource-constrained
-environments, while OpenSSH is a well-known standard SSH server
-implementation. By default, the ``core-image-sato`` image is configured
-to use Dropbear. The ``core-image-full-cmdline`` and ``core-image-lsb``
-images both include OpenSSH. The ``core-image-minimal`` image does not
-contain an SSH server.
+To illustrate how you can use these variables to modify your image, consider an
+example that selects the SSH server. The Yocto Project ships with two SSH
+servers you can use with your images: Dropbear and OpenSSH. Dropbear is a
+minimal SSH server appropriate for resource-constrained environments, while
+OpenSSH is a well-known standard SSH server implementation. By default, the
+``core-image-sato`` image is configured to use Dropbear. The
+``core-image-full-cmdline`` image includes OpenSSH. The ``core-image-minimal``
+image does not contain an SSH server.
 
 You can customize your image and change these defaults. Edit the
 :term:`IMAGE_FEATURES` variable in your recipe or use the

documentation/dev-manual/qemu.rst

@@ -280,12 +280,11 @@ present, the toolchain is also automatically used.
       networking.
 
    -  SSH servers are available in some QEMU images. The ``core-image-sato``
-      QEMU image has a Dropbear secure shell (SSH) server that runs with
-      the root password disabled. The ``core-image-full-cmdline`` and
-      ``core-image-lsb`` QEMU images have OpenSSH instead of Dropbear.
-      Including these SSH servers allow you to use standard ``ssh`` and
-      ``scp`` commands. The ``core-image-minimal`` QEMU image, however,
-      contains no SSH server.
+      QEMU image has a Dropbear secure shell (SSH) server that runs with the
+      root password disabled. The ``core-image-full-cmdline`` QEMU image has
+      OpenSSH instead of Dropbear. Including these SSH servers allow you to use
+      standard ``ssh`` and ``scp`` commands. The ``core-image-minimal`` QEMU
+      image, however, contains no SSH server.
 
    -  You can use a provided, user-space NFS server to boot the QEMU
       session using a local copy of the root filesystem on the host. In

documentation/ref-manual/images.rst

@@ -51,27 +51,6 @@ Here is a list of supported recipes:
 -  ``core-image-full-cmdline``: A console-only image with more
    full-featured Linux system functionality installed.
 
--  ``core-image-lsb``: An image that conforms to the Linux Standard Base
-   (LSB) specification. This image requires a distribution configuration
-   that enables LSB compliance (e.g. ``poky-lsb``). If you build
-   ``core-image-lsb`` without that configuration, the image will not be
-   LSB-compliant.
-
--  ``core-image-lsb-dev``: A ``core-image-lsb`` image that is suitable
-   for development work using the host. The image includes headers and
-   libraries you can use in a host development environment. This image
-   requires a distribution configuration that enables LSB compliance
-   (e.g. ``poky-lsb``). If you build ``core-image-lsb-dev`` without that
-   configuration, the image will not be LSB-compliant.
-
--  ``core-image-lsb-sdk``: A ``core-image-lsb`` that includes everything
-   in the cross-toolchain but also includes development headers and
-   libraries to form a complete standalone SDK. This image requires a
-   distribution configuration that enables LSB compliance (e.g.
-   ``poky-lsb``). If you build ``core-image-lsb-sdk`` without that
-   configuration, the image will not be LSB-compliant. This image is
-   suitable for development using the target.
-
 -  ``core-image-minimal``: A small image just capable of allowing a
    device to boot.