Revert recent improvement to qml.grad until closer to the next release #1080
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Context: PR #1067 introduced an improvement to
qml.grad
, which removed the need to index into scalar gradients. However, it was determined that we did not want the behaviour of 0.15.0-dev to diverge from 0.14.0 until further in the release cycle.Description of the Change: Reverts the change of #1067
Benefits: The same code for extracting the gradient of scalar functions will work on both 0.15.0-dev and 0.14.0
Possible Drawbacks: n/a
Related GitHub Issues: n/a