RecExCommon: remove obsolete uses of TriggerFlags

Two independent changes to remove uses of TriggerFlags:

• Remove TriggerFlags from RecoUsefulFlags.py as they are not useful anymore (and that file itself is barely used anyway).
• Delete sync_Trigger2Reco as the only remaining setting (enable trigger bytestream unpacking) is already applied explicitly in RecExCommon_topOptions.py.

This merge request affects 3 packages:

• Reconstruction/RecExample/RecExCommon
• Reconstruction/RecExample/RecExCond
• Trigger/TriggerCommon/TriggerJobOpts

Affected files list will not be printed in this case

Adding @goetz ,@rbielski as watchers

added Reconstruction Trigger master review-pending-level-1 labels

CI Result FAILURE (hash 7823c30c)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis	DetCommon
externals
cmake
make
required tests
optional 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
AnalysisBase: number of compilation errors 0, warnings 0
AthAnalysis: number of compilation errors 0, warnings 0
DetCommon: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 45723]

Changes look good, and there is nothing in the log to suggest the timeout in PhaseIIUpgrade_required-test is related to this update, but let me re-reun the CI to make sure.

Jakub (L1 shifter)

Jenkins please retry a build

This merge request affects 3 packages:

• Reconstruction/RecExample/RecExCommon
• Reconstruction/RecExample/RecExCond
• Trigger/TriggerCommon/TriggerJobOpts

Affected files list will not be printed in this case

Adding @goetz ,@rbielski as watchers

CI Result SUCCESS (hash 7823c30c)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis	DetCommon
externals
cmake
make
required tests
optional 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
AnalysisBase: number of compilation errors 0, warnings 0
AthAnalysis: number of compilation errors 0, warnings 0
DetCommon: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 45779]

CI is coming back ok now, so approving.

Jakub (L1 shifter)

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

merged

mentioned in commit 35bdc1f7

added sweep:ignore label