Remove StatelessTableTransform

Author: juliohm

src/TableTransforms.jl

@@ -77,4 +77,5 @@ export
   ColTable,
   →,
   ⊔
+
 end

src/transforms.jl

@@ -57,14 +57,6 @@ This function is intended for developers of new types.
 """
 function revertmeta end
 
-"""
-    StatelessTableTransform
-
-This trait is useful to signal that we can [`reapply`](@ref) a transform
-"fitted" with training data to "test" data without relying on the `cache`.
-"""
-abstract type StatelessTableTransform <: TableTransform end
-
 """
     StatelessFeatureTransform
 
@@ -180,8 +172,6 @@ reapplymeta(::FeatureTransform, meta, mcache) = meta
 # STATELESS FALLBACKS
 # --------------------
 
-reapply(transform::StatelessTableTransform, table, cache) = apply(transform, table) |> first
-
 reapply(transform::StatelessFeatureTransform, table, cache) = apply(transform, table) |> first
 
 # ------------------