Revert "Added async versions of WithParsed extension methods"

This reverts commit dae3081.

Author: joseangelmt

src/CommandLine/ParserResultExtensions.cs

@@ -2,7 +2,6 @@
 
 using System;
 using System.Collections.Generic;
-using System.Threading.Tasks;
 
 namespace CommandLine
 {
@@ -29,24 +28,6 @@ public static ParserResult<T> WithParsed<T>(this ParserResult<T> result, Action<
             return result;
         }
 
-        /// <summary>
-        /// Executes asynchronously <paramref name="action"/> if <see cref="CommandLine.ParserResult{T}"/> contains
-        /// parsed values.
-        /// </summary>
-        /// <typeparam name="T">Type of the target instance built with parsed value.</typeparam>
-        /// <param name="result">An <see cref="CommandLine.ParserResult{T}"/> instance.</param>
-        /// <param name="action">The <see cref="Func{T, Task}"/> to execute.</param>
-        /// <returns>The same <paramref name="result"/> instance as a <see cref="Task"/> instance.</returns>
-        public static async Task<ParserResult<T>> WithParsedAsync<T>(this ParserResult<T> result, Func<T, Task> action)
-        {
-            if (result is Parsed<T> parsed)
-            {
-                await action(parsed.Value);
-            }
-            return result;
-        }
-
-
         /// <summary>
         /// Executes <paramref name="action"/> if parsed values are of <typeparamref name="T"/>.
         /// </summary>
@@ -67,26 +48,6 @@ public static ParserResult<object> WithParsed<T>(this ParserResult<object> resul
             return result;
         }
 
-        /// <summary>
-        /// Executes asynchronously <paramref name="action"/> if parsed values are of <typeparamref name="T"/>.
-        /// </summary>
-        /// <typeparam name="T">Type of the target instance built with parsed value.</typeparam>
-        /// <param name="result">An verb result instance.</param>
-        /// <param name="action">The <see cref="Func{T, Task}"/> to execute.</param>
-        /// <returns>The same <paramref name="result"/> instance as a <see cref="Task"/> instance.</returns>
-        public static async Task<ParserResult<object>> WithParsedAsync<T>(this ParserResult<object> result, Func<T, Task> action)
-        {
-            if (result is Parsed<object> parsed)
-            {
-                if (parsed.Value is T)
-                {
-                    await action((T)parsed.Value);
-                }
-            }
-            return result;
-        }
-
-
         /// <summary>
         /// Executes <paramref name="action"/> if <see cref="CommandLine.ParserResult{T}"/> lacks
         /// parsed values and contains errors.
@@ -96,28 +57,11 @@ public static async Task<ParserResult<object>> WithParsedAsync<T>(this ParserRes
         /// <param name="action">The <see cref="System.Action"/> delegate to execute.</param>
         /// <returns>The same <paramref name="result"/> instance.</returns>
         public static ParserResult<T> WithNotParsed<T>(this ParserResult<T> result, Action<IEnumerable<Error>> action)
-        {
-            if (result is NotParsed<T> notParsed)
-            {
-                action(notParsed.Errors);
-            }
-            return result;
-        }
-
-        /// <summary>
-        /// Executes asynchronously <paramref name="action"/> if <see cref="CommandLine.ParserResult{T}"/> lacks
-        /// parsed values and contains errors.
-        /// </summary>
-        /// <typeparam name="T">Type of the target instance built with parsed value.</typeparam>
-        /// <param name="result">An <see cref="CommandLine.ParserResult{T}"/> instance.</param>
-        /// <param name="action">The <see cref="System.Func{Task}"/> delegate to execute.</param>
-        /// <returns>The same <paramref name="result"/> instance as a <see cref="Task"/> instance.</returns>
-        public static async Task<ParserResult<T>> WithNotParsedAsync<T>(this ParserResult<T> result, Func<IEnumerable<Error>, Task> action)
         {
             var notParsed = result as NotParsed<T>;
             if (notParsed != null)
             {
-                await action(notParsed.Errors);
+                action(notParsed.Errors);
             }
             return result;
         }