Merge pull request #3030 from stan-dev/fix/hcubature-unused-warning

Fix some unused variable warnings

Author: andrjohns

stan/math/prim/functor/hcubature.hpp

@@ -421,14 +421,6 @@ inline auto hcubature(const F& integrand, const ParsTuple& pars, const int dim,
       Eigen::Matrix<double, 5, 1>, Eigen::Matrix<double, 4, 1>>
       genz_malik;
 
-  auto gk_lambda = [&integrand, &pars](auto&& c) {
-    return stan::math::apply(
-        [](auto&& integrand, auto&& c, auto&&... args) {
-          return integrand(c, args...);
-        },
-        pars, integrand, c);
-  };
-
   if (dim == 1) {
     std::tie(result, err)
         = internal::gauss_kronrod(integrand, a[0], b[0], pars);

stan/math/prim/prob/wiener5_lpdf.hpp

@@ -405,7 +405,6 @@ inline auto wiener5_grad_a(const T_y& y, const T_a& a, const T_v& v_value,
                            const T_w& w_value, const T_sv& sv,
                            T_err&& err = log(1e-12)) noexcept {
   const auto two_log_a = 2 * log(a);
-  const auto log_y_asq = log(y) - two_log_a;
   const auto error_term
       = wiener5_compute_error_term(y, a, v_value, w_value, sv);
   const auto w = 1.0 - w_value;