zbackup: remove package

Package will not build with new protobuf, upstream hasn't seen a commit
since Feb 2016, a release hasn't been cut since Sep 2015, and issues/PRs
have sat for years without maintainer feedback or other activity.

This project is dead.

srcpkgs/zbackup/patches/cmake-build-type-none.patch

@@ -1,26 +0,0 @@
-Index: CMakeLists.txt
-===================================================================
---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -6,8 +6,6 @@ project( zbackup )
- 
- set( CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake" )
- 
--set( CMAKE_BUILD_TYPE Release )
--
- find_package( ZLIB REQUIRED )
- include_directories( ${ZLIB_INCLUDE_DIRS} )
- 
-Index: tartool/CMakeLists.txt
-===================================================================
---- a/tartool/CMakeLists.txt
-+++ b/tartool/CMakeLists.txt
-@@ -4,8 +4,6 @@
- cmake_minimum_required( VERSION 2.6.0 )
- project( tartool )
- 
--set( CMAKE_BUILD_TYPE Release )
--
- add_executable( tartool tartool.cc ../file.cc ../dir.cc )
- 
- install( TARGETS tartool DESTINATION bin )

srcpkgs/zbackup/template

@@ -1,13 +0,0 @@
-# Template file for 'zbackup'
-pkgname=zbackup
-version=1.4.4
-revision=23
-build_style=cmake
-hostmakedepends="protobuf"
-makedepends="zlib-devel liblzma-devel protobuf-devel openssl-devel lzo-devel"
-short_desc="Versatile deduplicating backup tool"
-maintainer="Orphaned <orphan@voidlinux.org>"
-license="GPL-2.0-or-later"
-homepage="http://zbackup.org/"
-distfiles="https://github.com/zbackup/zbackup/archive/${version}.tar.gz"
-checksum=efccccd2a045da91576c591968374379da1dc4ca2e3dec4d3f8f12628fa29a85