Hello, I see python3-zombie-imp being included by:
gtg_0.6-12
mdp_3.6-12
prody_2.6.1+dfsg-4
pycorrfit_1.3.1+nopack-5
pynfft_1.3.2-12
thefuck_3.32-0.5
mailnag_2.2.0-3
mnemosyne_2.11+ds1-2
pychopper_2.7.10-5
pygopherd_3.0.1-2
python-coverage-test-runner_1.13.1-6
trololio_1.0-4

but many of them already have the try/catch with fallback to the new implementation.
I think it is time to let python-zombie-imp go from Debian.

Will ask for removal in some months

Gianfranco