apache2: remove bbappend

The apache2 in meta-webserver has been upgraded to 2.4.39. This bbappend
has been integrated into apache2 recipe. So remove it.
Signed-off-by: Yi Zhao <yi.zhao@windriver.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>

meta-openstack/recipes-httpd/apache2/apache2_2.4.%.bbappend

-do_install_append() {
-    sed -i -e 's/#ServerName.*$/ServerName 127.0.0.1:80/' ${D}${sysconfdir}/apache2/httpd.conf
-    # Keep our logs together, also matches ubuntu and debian
-    sed -i -e 's@^\(.*\)/var/apache2/logs\(.*\)$@\1/var/log/apache2\2@g' ${D}${sysconfdir}/apache2/httpd.conf
-
-    # default layout for htdocsdir in 2.4.7 is different, create the following for
-    # backward compatibility reasons
-
-    mkdir -p ${D}${datadir}/${BPN}/default-site
-    ln -sf ../htdocs ${D}${datadir}/${BPN}/default-site/htdocs
-}
-
-FILES_${PN} += "${datadir}/${BPN}/default-site"
-SYSTEMD_AUTO_ENABLE_${PN} = "enable"