dev-manual: remove warning about += and :append

No longer necessary since a warning was added to BitBake
(https://git.openembedded.org/bitbake/commit/?id=8c31e75557dc6a8d8f407b5d24d6327889a3e3b1)

(From yocto-docs rev: f3069c927f24c5d1942c9bcc4f55bb77cd262c0e)

Signed-off-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 0 insertions, 5 deletions

diff --git a/documentation/dev-manual/common-tasks.rst b/documentation/dev-manual/common-tasks.rst
index 3eead147a3..9611a4f206 100644
--- a/documentation/dev-manual/common-tasks.rst
+++ b/documentation/dev-manual/common-tasks.rst
@@ -234,11 +234,6 @@ following list:
 
          KERNEL_FEATURES:append:qemuall=" features/debug/printk.scc"
 
-      .. note::
-
-         Avoiding "+=" and "=+" and using machine-specific ``:append``
-         and ``:prepend`` operations is recommended as well.
-
    -  *Place Machine-Specific Files in Machine-Specific Locations:* When
       you have a base recipe, such as ``base-files.bb``, that contains a
       :term:`SRC_URI` statement to a