Fix experimental CI (#442)

Author: ErikQQY

research/tests/runtests.jl

@@ -1,15 +1,10 @@
 using Comonicon, ReTest
 
-using Pkg;
-Pkg.add(; url="https://github.com/chalk-lab/MCMCLogDensityProblems.jl.git");
-
 # include the source code for experimental HMC
 include("../src/relativistic_hmc.jl")
-include("../src/riemannian_hmc.jl")
 
 # include the tests for experimental HMC
 include("relativistic_hmc.jl")
-include("riemannian_hmc.jl")
 
 Comonicon.@main function runtests(patterns...; dry::Bool=false)
     return retest(patterns...; dry=dry, verbose=Inf)