Delete ProductTangent

Author: oxinabox

src/stage1/forward.jl

@@ -2,7 +2,6 @@ partial(x::TangentBundle, i) = partial(getfield(x, :tangent), i)
 partial(x::ExplicitTangent, i) = getfield(getfield(x, :partials), i)
 partial(x::TaylorTangent, i) = getfield(getfield(x, :coeffs), i)
 partial(x::UniformTangent, i) = getfield(x, :val)
-partial(x::ProductTangent, i) = ProductTangent(map(x->partial(x, i), getfield(x, :factors)))
 partial(x::AbstractZero, i) = x
 
 

src/tangent.jl

@@ -137,16 +137,6 @@ Base.getindex(tangent::TaylorTangent, tti::TaylorTangentIndex) = tangent.coeffs[
 Base.getindex(tangent::TaylorTangent, tti::CanonicalTangentIndex) = tangent.coeffs[count_ones(tti.i)]
 
 
-"""
-    struct ProductTangent{T <: Tuple{Vararg{AbstractTangentSpace}}}
-
-Represents the product space of the given representations of the
-tangent space.
-"""
-struct ProductTangent{T <: Tuple} <: AbstractTangentSpace
-    factors::T
-end
-
 """
     struct UniformTangent
 
@@ -191,7 +181,7 @@ end
     struct TangentBundle{N, B, P}
 
 Represents a tangent bundle as an explicit primal together
-with some representation of (potentially a product of) the tangent space.
+with some representation of the tangent space.
 """
 TangentBundle