xfce4-windowck-plugin: remove

- inactive for a long time
- use old ABI from exo and libxfce4ui despite long transition period
- build broken with xfce4-4.16

srcpkgs/xfce4-windowck-plugin/patches/configure.ac.in.patch

@@ -1,7 +0,0 @@
-*** configure.ac.in	2015-06-15 21:40:48.000000000 +0200
---- configure.ac.in_correct	2016-09-28 13:28:33.896472563 +0200
-*************** AC_PROG_INSTALL()
-*** 47 ****
-! AC_PROG_INTLTOOL()
---- 47 ----
-! IT_PROG_INTLTOOL()

srcpkgs/xfce4-windowck-plugin/template

@@ -1,24 +0,0 @@
-# Template file for 'xfce4-windowck-plugin'
-pkgname=xfce4-windowck-plugin
-version=0.4.6
-revision=2
-build_style=gnu-makefile
-hostmakedepends="intltool xfce4-dev-tools exo-devel python3-devel glib-devel gettext-devel ImageMagick"
-makedepends="libwnck2-devel xfce4-panel-devel xorg-server-devel"
-depends="xfce4-panel>=4.13"
-short_desc="Puts the titlebar of a maximized window into a panel"
-maintainer="skurtix <skurtix@github.com>"
-license="GPL-3"
-homepage="https://github.com/cedl38/xfce4-windowck-plugin"
-distfiles="${homepage}/archive/v${version}.tar.gz"
-checksum=1643fa4a8bdbc401160fae6a132dcab89ed88d10231f84ed058f7a3e842763f7
-
-pre_configure() {
-	autogen_args="--prefix=/usr"
-
-	if [ "$CROSS_BUILD" ]; then
-		autogen_args+=" --host=${XBPS_CROSS_TRIPLET}"
-	fi
-
-	xdt-autogen ${autogen_args}
-}