Retire hlt2 2023 bandwidth test

Goes with lhcb-core/LHCbNightlyConf!1132 (merged), lhcb-core/LHCbPR2HD!272 (merged) and lhcb/Moore!2845 (merged)

Just removes the top-level wrapper script, and the configuration for this test one level lower.

scripts/benchmark-scripts/Moore_bandwidth_test.sh

 #!/bin/bash
 ###############################################################################
-# (c) Copyright 2023 CERN for the benefit of the LHCb Collaboration           #
+# (c) Copyright 2023-2024 CERN for the benefit of the LHCb Collaboration      #
 #                                                                             #
 # This software is distributed under the terms of the GNU General Public      #
 # Licence version 3 (GPL Version 3), copied verbatim in the file "COPYING".   #
@@ -22,8 +22,7 @@ Usage: Moore/run /path/to/Moore_bandwidth_test.sh [options] 2>&1 | tee <path-to-
        Expected to be called by e.g. Moore_hlt2_bandwidth.sh for the periodic LHCbPR tests.
 
 --process: "hlt1", "hlt2" or "spruce".
---input-data: "nominal", "2023" or "latest".
-    "2023" not currently available for process == spruce or hlt1.
+--input-data: "nominal" or "latest".
     "latest" not currently available for process == hlt1 or hlt2.
 -h|--help: print this message and exit.
 
@@ -128,12 +127,8 @@ case $PROCESS in
         CONFIG_FILE="${TEST_PATH_PREFIX}hlt2_bandwidth_input_nominal_with_gec.yaml"
         EXTRA_OPTS='$MOOREROOT/options/calo_decoding_packed.py $MOOREROOT/options/muon_geometry_v2.py'
         ;;
-        2023)
-        CONFIG_FILE="${TEST_PATH_PREFIX}hlt2_bandwidth_input_2023.yaml"
-        EXTRA_OPTS="${TEST_PATH_PREFIX}hlt2_bandwidth_input_2023_extra_opts.py"
-        ;;
         *)
-        echo "ERROR: --input-data must be \"nominal\" or \"2023\" for process \"$PROCESS\""
+        echo "ERROR: --input-data must be \"nominal\" for process \"$PROCESS\""
         exit 1
         ;;
     esac