Fix merge (1)

Author: penelopeysm

src/simple_varinfo.jl

@@ -632,15 +632,4 @@ function from_linked_internal_transform(vi::SimpleVarInfo, ::VarName, dist)
     return invlink_transform(dist)
 end
 
-# Threadsafe stuff.
-# For `SimpleVarInfo` we don't really need `Ref` so let's not use it.
-function ThreadSafeVarInfo(vi::SimpleVarInfo)
-    return ThreadSafeVarInfo(vi, zeros(typeof(getlogp(vi)), Threads.nthreads() * 2))
-end
-function ThreadSafeVarInfo(vi::SimpleVarInfo{<:Any,<:Ref})
-    return ThreadSafeVarInfo(
-        vi, [Ref(zero(getlogp(vi))) for _ in 1:(Threads.nthreads() * 2)]
-    )
-end
-
 has_varnamedvector(vi::SimpleVarInfo) = vi.values isa VarNamedVector