The "defund the police" movement originated with BLM, not Antifa. And the Wikipedia page[0] for it mentions the plan, in general terms
supports removing funds from police departments and reallocating them to non-policing forms of public safety and community support, such as social services, youth services, housing, education, healthcare and other community resources. Activists who use the phrase may do so with varying intentions; some seek modest reductions, while others argue for full divestment as a step toward the abolition of contemporary police services. Activists who support the defunding of police departments often argue that investing in community programs could provide a better crime deterrent for communities; funds would go toward addressing social issues, like poverty, homelessness, and mental disorders.
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https://en.wikipedia.org/wiki/Defund_the_police