Removed obsolete class dpctl.tensor.numpy_usm_shared

[oleksandr-pavlyk]

Remove dpctl/tensor/numpy_usm_shared.py and associated test file dpctl/tests/test_dparray.py where all tests were already skipped.

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[diptorupd]

Thanks for beating me to it.

[coveralls]

coverage: 84.771% (+1.5%) from 83.265% when pulling 8801c5f on remove-numpy-usm-shared into 47f4bc9 on master.

[github-actions]

View rendered docs @ https://intelpython.github.io/dpctl/pulls/1310/index.html

[github-actions]

Array API standard conformance tests for dpctl=0.14.6dev0=py310h7bf5fec_51 ran successfully.
Passed: 568
Failed: 432
Skipped: 119

[github-actions]

Deleted rendered PR docs from intelpython.github.com/dpctl, latest should be updated shortly. 🤞

[github-actions]

Array API standard conformance tests for dpctl=0.14.6dev0=py310h7bf5fec_51 ran successfully.
Passed: 566
Failed: 434
Skipped: 119