ref-manual: remove AUTHOR variable

Following https://git.openembedded.org/openembedded-core/commit/?id=9d5edd124b7dddb995ceddd79f8a7fc8cf44badf

(From yocto-docs rev: e7da4d122313f369be1c680dadd76ea53ba8dd04)

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

documentation/contributor-guide/recipe-style-guide.rst

@@ -144,7 +144,6 @@ general order when possible:
 
 -  :term:`SUMMARY`
 -  :term:`DESCRIPTION`
--  :term:`AUTHOR`
 -  :term:`HOMEPAGE`
 -  :term:`BUGTRACKER`
 -  :term:`SECTION`

documentation/ref-manual/variables.rst

@@ -192,10 +192,6 @@ system and gives an overview of their function and contents.
 
          ASSUME_SHLIBS = "libEGL.so.1:libegl-implementation"
 
-   :term:`AUTHOR`
-      The email address used to contact the original author or authors in
-      order to send patches and forward bugs.
-
    :term:`AUTO_LIBNAME_PKGS`
       When the :ref:`ref-classes-debian` class is inherited,
       which is the default behavior, :term:`AUTO_LIBNAME_PKGS` specifies which