Remove AppVeyor build

Remove the AppVeyor CI.
Contributes to App-vNext#980.

README.md

@@ -11,7 +11,7 @@ We are a member of the [.NET Foundation](https://www.dotnetfoundation.org/about)
 
 **Keep up to date with new feature announcements, tips & tricks, and other news through [www.thepollyproject.org](http://www.thepollyproject.org)**
 
-[![NuGet version](https://badge.fury.io/nu/polly.svg)](https://badge.fury.io/nu/polly) [![Build status](https://ci.appveyor.com/api/projects/status/imt7dymt50346k5u?svg=true)](https://ci.appveyor.com/project/joelhulen/polly) [![Slack Status](http://www.pollytalk.org/badge.svg)](http://www.pollytalk.org)
+[![NuGet version](https://badge.fury.io/nu/polly.svg)](https://badge.fury.io/nu/polly) [![Build status](https://github.com/App-vNext/Polly/workflows/build/badge.svg?branch=main&event=push)](https://github.com/App-vNext/Polly/actions?query=workflow%3Abuild+branch%3Amain+event%3Apush) [![Slack Status](http://www.pollytalk.org/badge.svg)](http://www.pollytalk.org)
 
 ![Polly logo](https://raw.github.com/App-vNext/Polly/main/Polly-Logo.png)
 

build.cake

@@ -44,7 +44,6 @@ Dictionary<string, object> gitVersionOutput;
 
 // Versioning
 string nugetVersion;
-string appveyorBuildNumber;
 string assemblyVersion;
 string assemblySemver;
 
@@ -147,14 +146,12 @@ Task("__UpdateAssemblyVersionInformation")
     Information("FullSemVer -> {0}", gitVersionOutput["FullSemVer"]);
     Information("AssemblySemVer -> {0}", gitVersionOutput["AssemblySemVer"]);
 
-    appveyorBuildNumber = gitVersionOutput["FullSemVer"].ToString();
     nugetVersion = gitVersionOutput["NuGetVersion"].ToString();
     assemblyVersion = gitVersionOutput["Major"].ToString() + ".0.0.0";
     assemblySemver = gitVersionOutput["AssemblySemVer"].ToString();
 
     Information("");
     Information("Mapping versioning information to:");
-    Information("AppVeyor build number -> {0}", appveyorBuildNumber);
     Information("NuGet package version -> {0}", nugetVersion);
     Information("AssemblyVersion -> {0}", assemblyVersion);
     Information("AssemblyFileVersion -> {0}", assemblySemver);
@@ -192,13 +189,6 @@ Task("__UpdateDotNetStandardAssemblyVersionNumber")
     }
 });
 
-Task("__UpdateAppVeyorBuildNumber")
-    .WithCriteria(() => AppVeyor.IsRunningOnAppVeyor)
-    .Does(() =>
-{
-    AppVeyor.UpdateBuildVersion(appveyorBuildNumber);
-});
-
 Task("__BuildSolutions")
     .Does(() =>
 {

src/Polly.sln

@@ -1,11 +1,12 @@
-Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 16
-VisualStudioVersion = 16.0.28705.295
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.4.33205.214
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{79FE9DBE-1155-4F78-A41F-FE95DEFA19DD}"
 	ProjectSection(SolutionItems) = preProject
-		..\appveyor.yml = ..\appveyor.yml
 		..\build.cake = ..\build.cake
+		..\.github\workflows\build.yml = ..\.github\workflows\build.yml
 		Directory.Build.props = Directory.Build.props
 		..\GitVersionConfig.yaml = ..\GitVersionConfig.yaml
 		..\global.json = ..\global.json