Revert "Merge branch 'trkmht_master' into 'master'"

Trigger/TrigAlgorithms/TrigEFMissingET/CMakeLists.txt

...Algorithms/TrigEFMissingET/TrigEFMissingET/METComponent.h

...rithms/TrigEFMissingET/TrigEFMissingET/SignedKinematics.h

...gAlgorithms/TrigEFMissingET/TrigEFMissingET/StatusFlags.h

Trigger/TrigAlgorithms/TrigEFMissingET/src/FexBase.cxx

Trigger/TrigAlgorithms/TrigEFMissingET/src/FexBase.h

Trigger/TrigAlgorithms/TrigEFMissingET/src/METComponent.cxx

...er/TrigAlgorithms/TrigEFMissingET/src/MonGroupBuilder.cxx

Trigger/TrigAlgorithms/TrigEFMissingET/src/MonGroupBuilder.h

...r/TrigAlgorithms/TrigEFMissingET/src/SignedKinematics.cxx

Trigger/TrigAlgorithms/TrigEFMissingET/src/StatusFlags.cxx

Trigger/TrigAlgorithms/TrigEFMissingET/src/TrkMHTFex.cxx

Trigger/TrigAlgorithms/TrigEFMissingET/src/TrkMHTFex.h

...rigEFMissingET/src/components/TrigEFMissingET_entries.cxx

...on/TrigAnalysisTest/share/q221_RDOtoRDOTrig_mt1_build.ref

.../TrigValidation/TrigUpgradeTest/share/full_menu_build.ref

Trigger/TrigValidation/TrigUpgradeTest/share/slice_met.ref

Trigger/TriggerCommon/TrigEDMConfig/python/TriggerEDMRun3.py

...rMenuMT/python/HLTMenuConfig/MET/METChainConfiguration.py

...riggerMenuMT/python/HLTMenuConfig/MET/METMenuSequences.py