------
## 最终结论
```python
def remove_tuples(lst, k):
    return [t for t in lst if len(t) != k]

# Test cases
assert remove_tuples([(4, 5), (4, ), (8, 6, 7), (1, ), (3, 4, 6, 7)], 1) == [(4, 5), (8, 6, 7), (3, 4, 6, 7)]
assert remove_tuples([(4, 5), (4,5), (6, 7), (1, 2, 3), (3, 4, 6, 7)], 2) == [(1, 2, 3), (3, 4, 6, 7)]
assert remove_tuples([(1, 4, 4), (4, 3), (8, 6, 7), (1,), (3, 6, 7)], 3) == [(4, 3), (1,)]
```