CaloTrackingGeometry: Thread-safety cleanup.

Remove unneeded thread-safety annotations.

This merge request affects 1 package:

• Calorimeter/CaloTrackingGeometry

Adding @pavol ,@amorley as watchers

added Calorimeter JetEtmiss master review-pending-level-1 labels

CI Result SUCCESS (hash 3700e885)

	Athena	AthSimulation	AthGeneration	AnalysisBase
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
AthGeneration: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 20975]

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

merged

mentioned in commit 0b975cf4

added sweep:ignore label