webstudio/app/shared/props-utils/delete-prop.ts

import { type AllUserProps, type DeleteProp } from "@webstudio-is/sdk";

export const deletePropMutable = (
  allProps: AllUserProps,
  deleteProp: DeleteProp
) => {
  const prop = allProps[deleteProp.instanceId];
  if (prop === undefined) return false;
  const index = prop.props.findIndex(({ id }) => id === deleteProp.propId);
  if (index === -1) return false;
  prop.props.splice(index, 1);
  return true;
};