Create remove-duplicates.py

In place algorithm for duplicate removal

remove-duplicates.py

@@ -0,0 +1,16 @@
+class Solution:
+    def removeDuplicates(self, nums: List[int]) -> int:
+        p1 = 0
+        p2 = 0
+        ln = len(nums)
+        while p2 < ln:
+            p1 += 1
+            curr = nums[p2]
+            while nums[p2] == curr:
+                p2 += 1
+                if p2 == ln:
+                    return p1
+
+            nums[p1] = nums[p2]
+
+        return p1