ref-manual: Scrubbed the comment list of undocumented classes.

(From yocto-docs rev: 7d5ebc1ef98970f147319f77918eefa4bdb5040f)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/ref-manual/ref-classes.xml

@@ -2900,106 +2900,8 @@
 </section>
 
 <!-- Undocumented classes are:
-        allarch.bbclass
-        bin_package.bbclass
-        blacklist.bbclass
-        bootimg.bbclass
-        boot-directdisk.bbclass
-        bugzilla.bbclass
-        buildhistory.bbclass
-        buildstats.bbclass
-        ccache.bbclass
-        chrpath.bbclass
-        clutter.bbclass
-        cmake.bbclass
-        cml1.bbclass
-        copyleft_compliance.bbclass
-        core-image.bbclass
-        cross.bbclass
-        cross-canadian.bbclass
-        crosssdk.bbclass
-        deploy.bbclass
-        distrodata.bbclass
-        distro_features_check.bbclass
-        dummy.bbclass
-        extrausers.bbclass
-        fontcache.bbclass
-        gconf.bbclass
-        gettext.bbclass
-        gnomebase.bbclass
-        gnome.bbclass
-        grub-efi.bbclass
-        gsettings.bbclass
-        gtk-doc.bbclass
-        gtk-icon-cache.bbclass
-        gtk-immodules-cache.bbclass
-        gzipnative.bbclass
-        icecc.bbclass
-        image-empty.bbclass
-        image-live.bbclass
-        image-vmdk.bbclass
-        image-mklibs.bbclass
-        image-prelink.bbclass
-        image-swab.bbclass
-        image_types.bbclass
-        image_types_uboot.bbclass
-        insserv.bbclass
-        kernel-arch.bbclass
-        kernel-module-split.bbclass
-        kernel-yocto.bbclass
-        lib_package.bbclass
-        linux-kernel-base.bbclass
-        license.bbclass
-        logging.bbclass
-        meta.bbclass
-        metadata_scm.bbclass
-        migrate_localcount.bbclass
-        mime.bbclass
-        mirrors.bbclass
-        multilib*.bbclass
-        native.bbclass
-        nativesdk.bbclass
-        oelint.bbclass
-        own-mirrors.bbclass
-        packagedata.bbclass
-        packageinfo.bbclass
-        patch.bbclass
-        perlnative.bbclass
-        pixbufcache.bbclass
-        pkg_distribute.bbclass
-        pkg_metainfo.bbclass
-        populate_sdk*.bbclass
-        prexport.bbclass
-        primport.bbclass
-        prserv.bbclass
-        ptest.bbclass
-        python-dir.bbclass
-        pythonnative.bbclass
-        qemu.bbclass
-        qmake*.bbclass
-        qt4*.bbclass
-        recipe_sanity.bbclass
-        relocatable.bbclass
-        scons.bbclass
-        sdl.bbclass
-        setuptools.bbclass
-        sip.bbclass
-        siteconfig.bbclass
-        sourcepkg.bbclass
-        spdx.bbclass
-        sstate.bbclass
-        staging.bbclass
-        syslinux.bbclass
-        systemd.bbclass
-        terminal.bbclass
-        tinderclient.bbclass
-        toolchain-scripts.bbclass
-        typecheck.bbclass
-        uboot-config.bbclass
-        utility-tasks.bbclass
-        utils.bbclass
-        vala.bbclass
-        waf.bbclass
+        image-empty.bbclass (possibly being dropped)
+        migrate_localcount.bbclass (still need a description)
 -->