Take out the Delay mnemonic

it is not so clear to use

src/toolbox_scs/constants.py

@@ -337,10 +337,6 @@ mnemonics = {
                      'key': 'result.value',
                      'dim': None},),
 
-    "Delay": ({'source': 'SCS_ILH_LAS/MDL/OPTICALDELAY_LT3',
-               'key': 'actualPosition.value',
-               'dim': None},),
-
     # AFS LASER
     "AFS_PhaseShifter": ({'source': 'SCS_ILH_LAS/PHASESHIFTER/DOOCS',
                           'key': 'actualPosition.value',