Remove unnecessary (and incorrect) Zygote rule for PDBijector (#286)

* Update BijectorsZygoteExt.jl

* Update BijectorsZygoteExt.jl

* Update Project.toml

* Update Project.toml

* Update Project.toml

Author: yebai

Project.toml

@@ -1,6 +1,6 @@
 name = "Bijectors"
 uuid = "76274a88-744f-5084-9051-94815aaf08c4"
-version = "0.13.5"
+version = "0.13.6"
 
 [deps]
 ArgCheck = "dce04be8-c92d-5529-be00-80e4d2c0e197"
@@ -30,6 +30,9 @@ ReverseDiff = "37e2e3b7-166d-5795-8a7a-e32c996b4267"
 Tracker = "9f7883ad-71c0-57eb-9f7f-b5c9e6d3789c"
 Zygote = "e88e6eb3-aa80-5325-afca-941959d7151f"
 
+[extras]
+Zygote = "e88e6eb3-aa80-5325-afca-941959d7151f"
+
 [extensions]
 BijectorsDistributionsADExt = "DistributionsAD"
 BijectorsForwardDiffExt = "ForwardDiff"
@@ -42,6 +45,7 @@ BijectorsZygoteExt = "Zygote"
 ArgCheck = "1, 2"
 ChainRules = "1"
 ChainRulesCore = "0.10.11, 1"
+Zygote = "0.6.63"
 ChangesOfVariables = "0.1"
 Compat = "3, 4"
 Distributions = "0.25.33"

ext/BijectorsZygoteExt.jl

@@ -224,9 +224,6 @@ end
     end
     return pullback(_maximum, d)
 end
-@adjoint function lower_triangular(A::AbstractMatrix)
-    return lower_triangular(A), Δ -> (lower_triangular(Δ),)
-end
 @adjoint function pd_from_lower(X::AbstractMatrix)
     return LowerTriangular(X) * LowerTriangular(X)',
     Δ -> begin