Removed unnecessary headers (design-doc #19)

bbbales2 · bbbales2 · commit a589de9d98df · 2020-07-10T09:35:45.000-04:00
diff --git a/stan/math/prim/fun/eval.hpp b/stan/math/prim/fun/eval.hpp
@@ -3,8 +3,6 @@
 
 #include <stan/math/prim/meta.hpp>
 #include <stan/math/prim/fun/Eigen.hpp>
-#include <cstddef>
-#include <vector>
 
 namespace stan {
 namespace math {
