dev/core#3100 - Remove grant leftovers from core xml. Remove empty grant reports menu

[colemanw]

This ports #22893 from @demeritcowboy to 5.48

[civibot]

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[demeritcowboy]

Is this waiting on something still? It runs ok for me.

Not a blocker but if the reasoning for moving it is to catch people in the last 2 days who've already installed 5.48 beta1, then my understanding is it should go in a function called beta2. But historically civi doesn't follow that pattern much, and it's only 2 days, and there's an understanding that they live on the edge if they install such things.

[colemanw]

Let's merge it before 2 days becomes 3!