remove duplicates from sorted list[int] leetcode

class Solution:
    def removeDuplicates(self, nums: List[int]) -> int:
        dupes = []

        previous = -101
        for i in range(len(nums)):
            if nums[i] == previous:
                dupes.append(nums[i])

            previous = nums[i]

        for x in dupes:
            nums.remove(x)