Remove `literal_getproperty` adjoint from SciMLBase

[DhairyaLGandhi]

Checklist

• [ ] Appropriate tests were added
• [ ] Any code changes were done in a way that does not break public API
• [ ] All documentation related to code changes were updated
• [ ] The new code follows the contributor guidelines, in particular the SciML Style Guide and COLPRAC.
• [ ] Any new documentation only uses public API

Additional context

Now that https://github.com/SciML/SciMLSensitivity.jl/pull/1056 has been merged, this adjoint can be removed from here.

Add any other context about the problem here.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 41.53%. Comparing base (de51914) to head (e1bce73).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #701 +/- ## =========================================== + Coverage 28.90% 41.53% +12.62% =========================================== Files 55 55 Lines 4573 4582 +9 =========================================== + Hits 1322 1903 +581 + Misses 3251 2679 -572 ```

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