Removed unused egammaFSEventDensitySequence from PrecisionPhoton
This is a quick fix to follow up on ATR-26113. Even if precision Photon and calorimeter isolation was succesfully split in !55836 (merged), I forgot on that MR to remove the EventDensity computation sequence (requesting FS) from PrecisionPhoton menu sequence file.
That is fixed here
Edited by Fernando Monticelli