In the v21 release notes we said:

The following configurations are no longer used and will be removed before the 22.0.0 release:

• fitFlag
• requiredFlag
• superStarSubCcd
• ccdGraySubCcd
• expGrayPhotometricCut
• expGrayHighCut
• expVarGrayPhotometricCut
• aperCorrInputSlopes
• sedFudgeFactors, use sedSlopeMap instead
• sigFgcmMaxEGray, use sigFgcmMaxEGrayDict instead
• approxThroughput, use approxThroughputDict instead
• colorSplitIndices, use colorSplitBands instead
• useRepeatabilityForExpGrayCuts, use useRepeatabilityForExpGrayCutsDict instead