Remove CUDA 11.6 note from complex docs (#100118)
Removes note in the complex docs pointing to the CUDA 11.6 wheels introduced in https://github.com/pytorch/pytorch/pull/80363.
Background: this warning was added via https://github.com/pytorch/pytorch/issues/79876 which pointed out a slow compilation time in 11.3. The 11.6 pip wheels were thus recommended but are not build anymore as our current support is 11.7, 11.8 (and 12.1 experimental in nightlies).
The note is confusing users as it doesn't explain why 11.6 is needed.
Reference: https://discuss.pytorch.org/t/complex-numbers-cuda-11-6-documentation-warning/178588/1
Pull Request resolved: https://github.com/pytorch/pytorch/pull/100118
Approved by: https://github.com/msaroufim
