Those who accept the notion of universal common descent claim that all life forms have descended for single cell organisms. Those single cell organisms had to have had some origin. That origin, at least as hypothesized back then was what people would call abiogenesis today.
"Those single cell organisms had to have had some origin. That origin, at least as hypothesized back then was what people would call abiogenesis today."
And it never was a part of the ToE.