Revert "component/mariadb: go back to mariadb 10.3.22"

This reverts commit 6004bd17.

component/mariadb/buildout.cfg

@@ -125,34 +125,3 @@ environment =
   CPPFLAGS=-I${groonga:location}/include/groonga -I${pcre:location}/include
   LDFLAGS=-L${groonga:location}/lib
   PKG_CONFIG_PATH=${groonga:location}/lib/pkgconfig:${groonga-normalizer-mysql:location}/lib/pkgconfig
-
-
-### XXX keep using mariadb 10.3.22 because 10.4 cause crash
-### (we just override here for easier revert)
-[mariadb]
-version = 10.3.22
-url = https://downloads.mariadb.org/f/mariadb-10.3.22/source/mariadb-10.3.22.tar.gz/from/http%3A//ftp.hosteurope.de/mirror/archive.mariadb.org/?serve
-md5sum = f712a5e6fde038d0c9c6d2a2cd88b84e
-pre-configure =
-  set -e '\bSET(PLUGIN_AUTH_PAM YES)' cmake/build_configurations/mysql_release.cmake
-  grep -q "$@"
-  sed -i "/$1/d" "$2"
-post-install =
-  ldd=`ldd ${:location}/lib/plugin/ha_rocksdb.so`
-  for x in ${lz4:location} ${snappy:location} ${zstd:location}
-  do echo "$ldd" |grep -qF " $x/lib/"
-  done
-  mkdir -p ${:location}/include/wsrep &&
-  cp -p wsrep/wsrep_api.h ${:location}/include/wsrep
-
-[mroonga-mariadb]
-pre-configure =
-  rm -rf fake_mariadb_source
-  mkdir -p fake_mariadb_source
-  cd fake_mariadb_source
-  ln -s ${mariadb:location}/wsrep-lib
-  cp -a ${mariadb:location}/include/mysql/server include
-  cp -a include/private sql
-  chmod -R a+w include sql # so that buildout can delete this compile-dir after install
-  mkdir -p ${:plugin-dir}
-### /XXX keep using mariadb 10.3.22 because 10.4 cause crash