Simplify how we copy docstrings for MOI enums

src/JuMP.jl

@@ -1313,20 +1313,9 @@ function _eval_instances_in_jump(moi_enum)
         # `eval` the instance as `const name = MOI.name`.
         eval(Expr(:const, Expr(:(=), name, enum)))
         # Documentation is not copied for a `const` expression of an object, so
-        # we need to manually set the docstring in this `@__MODULE__`.
+        # we need to manually set the docstring.
         docstr = Docs.docstr(Docs.Binding(MOI, name))
-        d = Docs.DocStr(
-            docstr.text,
-            nothing,
-            Dict{Symbol,Any}(
-                :typesig => Union{},
-                :module => @__MODULE__,
-                :linenumber => @__LINE__,
-                :binding => getfield(@__MODULE__, name),
-                :path => @__FILE__,
-            ),
-        )
-        Docs.doc!(@__MODULE__, Docs.Binding(@__MODULE__, name), d, Union{})
+        Docs.doc!(@__MODULE__, Docs.Binding(@__MODULE__, name), docstr)
     end
     return
 end