manuals: reduce verbosity with "worry about" expression

(From yocto-docs rev: 6c65f5f350cdc79a435deb20c48d861d9f4c5c14)

Signed-off-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Reviewed-by: Quentin Schulz <foss@0leil.net>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/ref-manual/classes.rst

@@ -1260,8 +1260,8 @@ The following list shows the tests you can list with the ``WARN_QA`` and
 
    .. note::
 
-      If you are not using runtime package management on your target
-      system, then you do not need to worry about this situation.
+      This is only relevant when you are using runtime package management
+      on your target system.
 
 -  ``xorg-driver-abi:`` Checks that all packages containing Xorg
    drivers have ABI dependencies. The ``xserver-xorg`` recipe provides

documentation/ref-manual/structure.rst

@@ -38,7 +38,7 @@ usually matches the current stable BitBake release from the BitBake
 project. BitBake, a :term:`Metadata` interpreter, reads the
 Yocto Project Metadata and runs the tasks defined by that data. Failures
 are usually caused by errors in your Metadata and not from BitBake
-itself; consequently, most users do not need to worry about BitBake.
+itself.
 
 When you run the ``bitbake`` command, the main BitBake executable (which
 resides in the ``bitbake/bin/`` directory) starts. Sourcing the