LArG4MiniFCAL+LArGeoCode+LArOnlDbPrep+LArROD+LArSim: Remove reference to StoreGate.h.

Scott Snyderrequested to merge
ssnyder/athena:sg.LArG4MiniFCAL-20201014 into master

Remove reference to obsolete header StoreGate.h.

Also remove obsolete use of DataHandle.

Edited by Scott Snyder

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