diff --git a/src/factors/flux/FluxModelsPose2Pose2.jl b/src/factors/flux/FluxModelsPose2Pose2.jl
index 04accd3c..46ccdfcb 100644
--- a/src/factors/flux/FluxModelsPose2Pose2.jl
+++ b/src/factors/flux/FluxModelsPose2Pose2.jl
@@ -3,7 +3,6 @@
 # the factor definitions
 export FluxModelsPose2Pose2, sampleFluxModelsPose2Pose2, PackedFluxModelsPose2Pose2
 # some utilities
-export flattenFactorModel
 export setShuffleAll!, setNaiveFracAll!
 
 
@@ -254,16 +253,6 @@ end
 
 ## Utilities
 
-# return dict that can be stored as JSON
-function flattenFactorModel(d::FluxModelsPose2Pose2)
-  packed = convert(PackedFluxModelsPose2Pose2, d)
-  retdict = Dict{Symbol, Any}()
-  retdict[:joyVelData] = packed.joyVelData
-  retdict[:naiveModel] = packed.naiveModel
-  retdict[:naiveFrac] = packed.naiveFrac
-  retdict[:modelWeightsAll] = packed.modelWeightsAll
-  return retdict
-end
 
 function setShuffleAll!(dfg::AbstractDFG, shuf::Bool)
   fs = lsf(dfg, FluxModelsPose2Pose2)
@@ -278,4 +267,5 @@ function setNaiveFracAll!(dfg::AbstractDFG, frac::Real)
 end
 
 
+
 #