dependency tree fix

pyzmq is already there. So you can remove this from the todolist. BTW, if you are not familiar with rmadison, try it on a Debian system.

$ rmadison -S pyzmq
pypy-zmq           | 17.1.2-2+deb10u1 | oldoldstable | amd64, arm64, armhf, i386
python-zmq         | 17.1.2-2+deb10u1 | oldoldstable | amd64, arm64, armhf, i386
python-zmq-dbg     | 17.1.2-2+deb10u1 | oldoldstable | amd64, arm64, armhf, i386
python3-zmq        | 17.1.2-2+deb10u1 | oldoldstable | amd64, arm64, armhf, i386
python3-zmq        | 20.0.0-1+b1      | oldstable    | amd64, arm64, armel, armhf, i386, mips64el, mipsel, ppc64el, s390x
python3-zmq        | 24.0.1-4+b1      | stable       | amd64, arm64, armel, armhf, i386, mips64el, mipsel, ppc64el, s390x
python3-zmq        | 26.4.0-1         | testing      | amd64, arm64, armel, armhf, i386, ppc64el, riscv64, s390x
python3-zmq        | 26.4.0-1         | unstable     | amd64, arm64, armel, armhf, i386, mips64el, ppc64el, riscv64, s390x
python3-zmq-dbg    | 17.1.2-2+deb10u1 | oldoldstable | amd64, arm64, armhf, i386
python3-zmq-dbg    | 20.0.0-1+b1      | oldstable    | amd64, arm64, armel, armhf, i386, mips64el, mipsel, ppc64el, s390x
python3-zmq-dbgsym | 24.0.1-4+b1      | stable-debug | amd64, arm64, armel, armhf, i386, mips64el, mipsel, ppc64el, s390x
pyzmq              | 17.1.2-2+deb10u1 | oldoldstable | source
pyzmq              | 20.0.0-1         | oldstable    | source
pyzmq              | 24.0.1-4         | stable       | source
pyzmq              | 26.4.0-1         | testing      | source
pyzmq              | 26.4.0-1         | unstable     | source