#2678: clean up GRHydro schedule file

GRHydro currently:

schedules storage for conformal_state which it no longer uses (since git hash 8a91441 "GRHydro: * remove dependence on StaticConformal * change calculation of the determinant of the 3-metric from a subroutine call to a macro." of einsteinevolve)
tries to register its banner in WRAGH which is too late, it must be done in STARTUP (http://einsteintoolkit.org/referencemanual/ReferenceManual.html#x1-174000A2)

Pull request

fixes these.

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