Remove Appveyor from Readme and SLN (#3026)

* Replace Appveyor with Github badge.

* Delete appveyor.yml

* Remove Appveyor from SLN

README.md

@@ -17,8 +17,8 @@
 
 </p>
 <p align="center">
-    <a href="https://ci.appveyor.com/project/gdkchan/ryujinx?branch=master">
-        <img src="https://ci.appveyor.com/api/projects/status/ssg4jwu6ve3k594s/branch/master?svg=true"
+    <a href="https://github.com/Ryujinx/Ryujinx/actions/workflows/release.yml">
+        <img src="https://github.com/Ryujinx/Ryujinx/actions/workflows/release.yml/badge.svg"
             alt="">
     </a>
     <a href="https://discord.com/invite/VkQYXAZ">

Ryujinx.sln

@@ -34,7 +34,6 @@ EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{36F870C1-3E5F-485F-B426-F0645AF78751}"
 	ProjectSection(SolutionItems) = preProject
 		.editorconfig = .editorconfig
-		appveyor.yml = appveyor.yml
 	EndProjectSection
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Ryujinx.Memory", "Ryujinx.Memory\Ryujinx.Memory.csproj", "{A5E6C691-9E22-4263-8F40-42F002CE66BE}"