L1CommonCore: Delete obsolete package

The only file in that package is no longer used.

Relates to ATR-19150.

This merge request affects 1 package:

• Trigger/TrigT1/L1CommonCore

Adding @kwhalen ,@afaulkne as watchers

added Trigger master review-pending-level-1 labels

CI Result SUCCESS (hash 8fbcb656)

	Athena	AthSimulation	AnalysisBase	AthGeneration
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 17320]

Just removed an obsolete file and CI is happy, so approving. (L2)

added review-approved label and removed review-pending-level-1 label

merged

mentioned in commit 0e1bd2a5

added sweep:ignore label