Remove the arity parameter of type function$.

Author: cristianoc

analysis/src/CompletionBackEnd.ml

@@ -1362,7 +1362,7 @@ let rec completeTypedValue ?(typeArgContext : typeArgContext option) ~rawOpens
       | Tlink t1
       | Tsubst t1
       | Tpoly (t1, [])
-      | Tconstr (Pident {name = "function$"}, [t1; _], _) ->
+      | Tconstr (Pident {name = "function$"}, [t1], _) ->
         fnReturnsTypeT t1
       | Tarrow _ -> (
         match TypeUtils.extractFunctionType ~env ~package:full.package t with

analysis/src/CompletionJsx.ml

@@ -238,7 +238,7 @@ let getJsxLabels ~componentPath ~findTypeOfValue ~package =
       | Tlink t1
       | Tsubst t1
       | Tpoly (t1, [])
-      | Tconstr (Pident {name = "function$"}, [t1; _], _) ->
+      | Tconstr (Pident {name = "function$"}, [t1], _) ->
         getLabels t1
       | Tconstr (p, [propsType], _) when Path.name p = "React.component" -> (
         let rec getPropsType (t : Types.type_expr) =