172. Remove Elements from Array

Write a function solve that removes all instances of a given value from an array and returns the modified array.

Example:
Input: nums = [3, 2, 2, 3], val = 3
Output: [2, 2]

Example 2:
Input: nums = [0, 1, 2, 2, 3, 0, 4, 2], val = 2
Output: [0, 1, 3, 0, 4]

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