Remove old RPM stuff

extra/rpm/mock/tarantool-el-5-i386.cfg

extra/rpm/mock/tarantool-el-5-x86_64.cfg

extra/rpm/mock/tarantool-el-6-i386.cfg

extra/rpm/mock/tarantool-el-6-x86_64.cfg

extra/rpm/mock/tarantool-el-7-x86_64.cfg

extra/rpm/mock/tarantool-fedora-19-i386.cfg

extra/rpm/mock/tarantool-fedora-19-x86_64.cfg

extra/rpm/mock/tarantool-fedora-20-i386.cfg

extra/rpm/mock/tarantool-fedora-20-x86_64.cfg

extra/rpm/mock/tarantool-fedora-21-i386.cfg

extra/rpm/mock/tarantool-fedora-21-x86_64.cfg

extra/rpm/mock/tarantool-fedora-22-i386.cfg

extra/rpm/mock/tarantool-fedora-22-x86_64.cfg

extra/rpm/mock/tarantool-fedora-rawhide-i386.cfg

extra/rpm/mock/tarantool-fedora-rawhide-x86_64.cfg

extra/rpm/tarantool-scl.rpm.spec