toRemove(str, all) {
    let [prop, value] = this.parse(str)
    let unprefixed = this.all.unprefixed(prop)

    let cleaner = this.all.cleaner()

    if (
      cleaner.remove[prop] &&
      cleaner.remove[prop].remove &&
      !this.isHack(all, unprefixed)
    ) {
      return true
    }

    for (let checker of cleaner.values('remove', unprefixed)) {
      if (checker.check(value)) {
        return true
      }
    }

    return false
  }
Return true if we need to remove node