Review deprecations for 0.56

[stuartarchibald]

As title. Current known changed needed include:

• CUDA: Deprecate support for CC < 5.3 and CTK < 10.2, xref CUDA: Deprecate support for CC < 5.3 and CTK < 10.2 #7755
• Remove the add_user_function() function: https://numba.readthedocs.io/en/latest/reference/deprecation.html#deprecation-of-numba-core-base-basecontext-add-user-function
• Eager compilation of device functions: https://numba.readthedocs.io/en/latest/reference/deprecation.html#deprecation-of-eager-compilation-of-cuda-device-functions
• CUDA: Update deprecation notes for 0.56. #8191

[esc]

• Remove the add_user_function() function: https://numba.readthedocs.io/en/latest/reference/deprecation.html#deprecation-of-numba-core-base-basecontext-add-user-function

Looking at the latest docs at: https://numba.readthedocs.io/en/latest/reference/deprecation.html#deprecation-and-removal-of-numba-core-base-basecontext-add-user-function

The removal with 0.56 is already documented.

[esc]

• CUDA: Deprecate support for CC < 5.3 and CTK < 10.2, xref CUDA: Deprecate support for CC < 5.3 and CTK < 10.2 #7755

Looking at:

https://numba.readthedocs.io/en/latest/reference/deprecation.html#deprecation-and-removal-of-cuda-toolkits-10-2-and-devices-with-cc-5-3

This has been taken care of already, it seems.

[esc]

• Eager compilation of device functions: https://numba.readthedocs.io/en/latest/reference/deprecation.html#deprecation-of-eager-compilation-of-cuda-device-functions

@gmarkall question: does the above need an entry for what happens with 0.56?

[gmarkall]

• Eager compilation of device functions: https://numba.readthedocs.io/en/latest/reference/deprecation.html#deprecation-of-eager-compilation-of-cuda-device-functions

@gmarkall question: does the above need an entry for what happens with 0.56?

No, nothing's changed here, but I think it's worth leaving in for reference for now, because the change doesn't have an obvious breaking effect like "suddenly existing code doesn't compile" but it does have a side effect in terms of when things are compiled, so I think it's useful to have to refer to.

[gmarkall]

Note that #8191 also fixes up a couple of deprecation-related items for the ptx property and inspect_ptx().

[gmarkall]

(BTW I looked into all the other things on this issue and I think they're all as they should be already, so I'm going to tick the boxes).