drop support for NCCL 2.6 and 2.7
@@ -54,7 +54,7 @@ Part of the CUDA features in CuPy will be activated only when the corresponding
* The library to accelerate tensor operations. See :doc:`../reference/environment` for the details.
-* `NCCL <https://developer.nvidia.com/nccl>`_: v2.6 / v2.7 / v2.8 / v2.9 / v2.10 / v2.11
+* `NCCL <https://developer.nvidia.com/nccl>`_: v2.8 / v2.9 / v2.10 / v2.11
* The library to perform collective multi-GPU / multi-node computations.
