Merge branch 'l1commoncore_delete' into 'master'

L1CommonCore: Delete obsolete package

See merge request atlas/athena!34856

Trigger/TrigT1/L1CommonCore/CMakeLists.txt

-################################################################################
-# Package: L1CommonCore
-################################################################################
-
-# Declare the package name:
-atlas_subdir( L1CommonCore )
-
-# External dependencies:
-find_package( tdaq-common COMPONENTS CTPfragment )
-
-# Install files from the package:
-atlas_install_headers( L1CommonCore )
-

Trigger/TrigT1/L1CommonCore/L1CommonCore/CTPdataformatVersion.h

-/*
-  Copyright (C) 2002-2018 CERN for the benefit of the ATLAS collaboration
-*/
-
-#pragma message( "The package L1CommonCore is obsolete and will be removed" )
-#include "CTPfragment/CTPdataformatVersion.h"