Simplify varinfo constructors

src/sampler.jl

@@ -87,7 +87,7 @@ function AbstractMCMC.step(
     rng::Random.AbstractRNG, model::Model, spl::Sampler; initial_params=nothing, kwargs...
 )
     # Sample initial values.
-    vi = typed_varinfo(rng, model, initialsampler(spl), DefaultContext())
+    vi = VarInfo(rng, model, initialsampler(spl), DefaultContext())
 
     # Update the parameters if provided.
     if initial_params !== nothing

src/varinfo.jl

@@ -163,42 +163,16 @@ function has_varnamedvector(vi::VarInfo)
            (vi isa TypedVarInfo && any(Base.Fix2(isa, VarNamedVector), values(vi.metadata)))
 end
 
-"""
-    untyped_varinfo([rng, ]model[, sampler, context])
-
-Return an untyped `VarInfo` instance for the model `model`.
-"""
-function untyped_varinfo(
-    rng::Random.AbstractRNG,
-    model::Model,
-    sampler::AbstractSampler=SampleFromPrior(),
-    context::AbstractContext=DefaultContext(),
-    metadata::Union{Metadata,VarNamedVector}=Metadata(),
-)
-    varinfo = VarInfo(metadata)
-    return last(evaluate!!(model, varinfo, SamplingContext(rng, sampler, context)))
-end
-function untyped_varinfo(
-    model::Model, args::Union{AbstractSampler,AbstractContext,Metadata,VarNamedVector}...
-)
-    return untyped_varinfo(Random.default_rng(), model, args...)
-end
-
-"""
-    typed_varinfo([rng, ]model[, sampler, context])
-
-Return a typed `VarInfo` instance for the model `model`.
-"""
-typed_varinfo(args...) = TypedVarInfo(untyped_varinfo(args...))
-
 function VarInfo(
     rng::Random.AbstractRNG,
     model::Model,
     sampler::AbstractSampler=SampleFromPrior(),
     context::AbstractContext=DefaultContext(),
     metadata::Union{Metadata,VarNamedVector}=Metadata(),
 )
-    return typed_varinfo(rng, model, sampler, context, metadata)
+    varinfo = VarInfo(metadata)
+    untyped_varinfo = last(evaluate!!(model, varinfo, SamplingContext(rng, sampler, context)))
+    return TypedVarInfo(untyped_varinfo)
 end
 VarInfo(model::Model, args...) = VarInfo(Random.default_rng(), model, args...)