Remove repeated tests + fixes

Author: marcinjahn

CSharpFunctionalExtensions.Tests/MaybeTests/Extensions/ToResultTests.Task.Left.cs

@@ -22,7 +22,7 @@ public async Task ToResult_Task_returns_success_if_has_value()
         {
             var maybe = Maybe<T>.From(T.Value);
 
-            var result = await maybe.AsTask().ToResult("Error".AsTask());
+            var result = await maybe.AsTask().ToResult("Error");
 
             result.IsSuccess.Should().BeTrue();
             result.Value.Should().Be(T.Value);

CSharpFunctionalExtensions.Tests/MaybeTests/Extensions/ToResultTests.Task.cs

@@ -23,7 +23,7 @@ public async Task ToResult_ValueTask_returns_success_if_has_value()
         {
             var maybe = Maybe<T>.From(T.Value);
 
-            var result = await maybe.AsValueTask().ToResult("Error".AsValueTask());
+            var result = await maybe.AsValueTask().ToResult("Error");
 
             result.IsSuccess.Should().BeTrue();
             result.Value.Should().Be(T.Value);