Pydantic: Disable root_validator in child class

Question

Is it possible to disable or remove or replace superclass's root validator in pydantic for child classes?

Here is an example:

from pydantic import BaseModel, root_validator


def parent_validator(cls, values):
    print('parent validator triggered')
    return values


def child_validator(cls, values):
    print('child validator triggered')
    return values


class ParentModel(BaseModel):
    name: str
    _custom_validator = root_validator()(parent_validator)


class ChildModel(ParentModel):
    _custom_validator = root_validator()(child_validator)


m1 = ParentModel(name='example name')
# outputs:
# parent validator triggered

m2 = ChildModel(name='example name 2')
# outputs:
# parent validator triggered
# child validator triggered

Expected behaviour:

m2 = ChildModel(name='example name 2')
# outputs:
# child validator triggered

A perfect solution for me would be something like this:

class ChildModel(ParentModel):
    _custom_validator = None

but it doesn't seem to work. Tried with pydantic==1.9.1