Remove Python 2.x code?

[edreamleo]

The latest readme says "[pyflakes] supports all active versions of Python: 3.8+".

Yet checker.py contains the following counter function:

def counter(items):
    """
    Simplest required implementation of collections.Counter. Required as 2.6
    does not have Counter in collections.
    """
    results = {}
    for item in items:
        results[item] = results.get(item, 0) + 1
    return results

Why is this function necessary?

[asottile]

it still works and nobody has bothered to remove it