Update AsyncSeq.fsi

Author: dsyme

src/FSharp.Control.AsyncSeq/AsyncSeq.fsi

@@ -90,11 +90,6 @@ module AsyncSeq =
         /// also the AsyncSeq.collect function.
         member For : source:AsyncSeq<'T> * action:('T -> AsyncSeq<'TResult>) -> AsyncSeq<'TResult>
 
-        /// Implements "return" for the asyncSeq computation builder.
-        // Commented because there does not seem to be a way to specify the correct parameter type to the compiler.
-        // What is needed is one parameter of type unit, but the below is interpreted as zero parameters.
-        //member Return : unit -> AsyncSeq<'T>
-
         /// Implements "try-finally" for the asyncSeq computation builder.
         member TryFinally : body:AsyncSeq<'T> * compensation:(unit -> unit) -> AsyncSeq<'T>
 
@@ -534,4 +529,4 @@ module AsyncSeqSrc =
   /// Creates an async sequence which yields values as they are put into the source and terminates
   /// when the source is closed. This sequence will yield items starting with the next put.
   /// Many async sequences can be created from once source.
-  val toAsyncSeq : src:AsyncSeqSrc<'T> -> AsyncSeq<'T>
+  val toAsyncSeq : src:AsyncSeqSrc<'T> -> AsyncSeq<'T>