Add README for Remove Duplicates Problem

Author: khairalanam

L-I/0007 RemoveDuplicates/README.md

@@ -0,0 +1,60 @@
+# Palindrome (L-I)
+
+## Problem
+
+- Write a function in JavaScript that takes a sorted array of integers as input and returns an array with unique elements
+
+- Example Inputs and Outputs:
+
+- Input: `[0, 0, 1, 1, 1, 2, 2, 3, 3, 4]` -> Output: `[ 0, 1, 2, 3, 4 ]`
+- Input: `[1, 1, 1, 2, 2, 3, 3, 4, 6, 7, 8, 8, 9]` -> Output: `[
+  1, 2, 3, 4,
+  6, 7, 8, 9
+]`
+
+## Solution
+
+```javascript
+const RemoveDuplicates = (nums) => {
+  i = 1;
+
+  size = nums.length;
+
+  while (i < size) {
+    if (nums[i] === nums[i - 1]) {
+      nums.splice(i, 1);
+      size -= 1;
+    } else i += 1;
+  }
+
+  return nums;
+};
+```
+
+## How it works
+
+- The function takes an array `nums` as input and returns `nums` with unique elements.
+
+- We initialise an index `i` to be `1` and `size` to be the length of `nums`.
+
+- We run a while loop whenever `i < size`.
+
+- if the current element at index `i` is equal to the previous element, then remove the current element from `nums`
+
+- If not, then increment `i` by `1`.
+
+- After the while loop terminates, we return the `nums` array.
+
+## References
+
+- [Leetcode](https://leetcode.com/problems/remove-duplicates-from-sorted-array/)
+
+## Problem Added By
+
+- [GitHub](https://www.github.com/khairalanam)
+- [LinkedIn](https://www.linkedin.com/in/khair-alanam-b27b69221/)
+- [Twitter](https://twitter.com/khair_alanam)
+
+## Contributing
+
+Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.