AthenaRootComps: remove use of ConfigurableRun3Behavior

Remove unnecessary usage of ConfigurableRun3Behavior.

This merge request affects 1 package:

• Database/AthenaRoot/AthenaRootComps

This merge request affects 1 file:

• Database/AthenaRoot/AthenaRootComps/python/xAODEventSelectorConfig.py

Adding @mnowak ,@ssnyder as watchers

added Database master review-pending-level-1 labels

CI Result SUCCESS (hash fd2a2398)

	Athena	AthSimulation	AthGeneration	AthAnalysis
externals
cmake
make
tests

Full details available on this CI monitor view. Check the JIRA CI status board for known problems
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
AthAnalysis: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 63689]

removed review-pending-level-1 label

added reverted review-approved labels

removed reverted label

removed review-approved label

added review-approved label

merged

mentioned in commit 9ff6af73

added sweep:ignore label