remove duplicates from array

Question

You have given an array from which we need to remove duplicates.

Rules:

1. First or immediate duplicates gets removed first.

2. Array contains natural numbers a[i]>0 for i>=0

3. no. of elements in the array is greater than 1 i.e. n>1

e.g.

{1,2,3,4,5,5,4,6,6,7,8}=> {1,2,3,7,8}
{1,2,3,3,4,5,6,7,7,8} => {1,2,4,5,6,8}
{1,1,3,3,4,4,6,6}=>{}
{4,2,6,8,3,1,1,3,8,6,2,4}=>{}
{6,6,6,1}=>{6,1}

Only adjacent duplicate elements like [1, 2, 2, 1] are removed, but not [1, 2, 1, 2]. This process is repeated until no further modifications are made.

For winning criteria is the one which gives the fastest result.

Answer 1

Python 2, 201 bytes

array = input()
index = 0
while index < len(array) - 1:
	if index >= 0 and array[index] == array[index + 1]:
		array = array[:index] + array[index + 2:]
		index -= 1
		continue
	index += 1
print(array)

Try it online!

Optimizations thanks to Mr. Xcoder