Remove deprecated playground project

Elasticsearch.sln

@@ -25,8 +25,6 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "benchmarks", "benchmarks",
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Benchmarks", "benchmarks\Benchmarks\Benchmarks.csproj", "{701DB05B-1F1B-485F-9EDF-0274EED4FF9F}"
 EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "PlaygroundV7x", "src\PlaygroundV7x\PlaygroundV7x.csproj", "{7141AB85-10C5-42AE-8FC7-B14A4216A89F}"
-EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Profiling", "benchmarks\Profiling\Profiling.csproj", "{5222D7CD-3663-49ED-98EA-4B5ECDF705BF}"
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{D9FFF81B-26F3-4A26-9605-E3D22382E9A5}"
@@ -89,10 +87,6 @@ Global
 		{701DB05B-1F1B-485F-9EDF-0274EED4FF9F}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{701DB05B-1F1B-485F-9EDF-0274EED4FF9F}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{701DB05B-1F1B-485F-9EDF-0274EED4FF9F}.Release|Any CPU.Build.0 = Release|Any CPU
-		{7141AB85-10C5-42AE-8FC7-B14A4216A89F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{7141AB85-10C5-42AE-8FC7-B14A4216A89F}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{7141AB85-10C5-42AE-8FC7-B14A4216A89F}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{7141AB85-10C5-42AE-8FC7-B14A4216A89F}.Release|Any CPU.Build.0 = Release|Any CPU
 		{5222D7CD-3663-49ED-98EA-4B5ECDF705BF}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{5222D7CD-3663-49ED-98EA-4B5ECDF705BF}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{5222D7CD-3663-49ED-98EA-4B5ECDF705BF}.Release|Any CPU.ActiveCfg = Release|Any CPU
@@ -131,7 +125,6 @@ Global
 		{587DE66B-6FAB-4722-9C53-2812BEFB6A44} = {362B2776-4B29-46AB-B237-56776B5372B6}
 		{0B4DCA79-10CC-4CB8-95D3-A4EB8C98BE1C} = {362B2776-4B29-46AB-B237-56776B5372B6}
 		{701DB05B-1F1B-485F-9EDF-0274EED4FF9F} = {B7B8819B-3197-4AB6-B61B-9E1BFD1EC302}
-		{7141AB85-10C5-42AE-8FC7-B14A4216A89F} = {D455EC79-E1E0-4509-B297-0DA3AED8DFF7}
 		{5222D7CD-3663-49ED-98EA-4B5ECDF705BF} = {B7B8819B-3197-4AB6-B61B-9E1BFD1EC302}
 		{F8A7E60C-0C48-4D76-AF7F-7881DF5A263D} = {D455EC79-E1E0-4509-B297-0DA3AED8DFF7}
 		{68D1BFDC-F447-4D2C-AF81-537807636610} = {1FE49D14-216A-41EE-A177-E42BFF53E0DC}

global.json

@@ -1,10 +1,7 @@
 {
   "sdk": {
-    "version": "8.0.100",
-    "rollForward": "minor",
+    "version": "8.0.400",
+    "rollForward": "latestFeature",
     "allowPrerelease": false
-  },
-  "version": "8.8.0-alpha.1",
-  "doc_current": "main",
-  "doc_branch": "main"
+  }
 }

nuget.config

@@ -1,8 +1,13 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
+<!-- https://learn.microsoft.com/en-us/nuget/reference/nuget-config-file -->
 <configuration>
 	<packageSources>
-		<clear /> <!-- ensure only the sources defined below are used -->
-		<add key="NuGet official package source" value="https://api.nuget.org/v3/index.json" />
-		<add key="Versioned Clients" value="https://f.feedz.io/elastic/all/nuget/index.json" />
+		<clear />
+		<add key="nuget.org" value="https://api.nuget.org/v3/index.json" />
 	</packageSources>
+	<packageSourceMapping>
+		<packageSource key="nuget.org">
+			<package pattern="*" />
+		</packageSource>
+	</packageSourceMapping>
 </configuration>

src/Playground/Playground.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
   </PropertyGroup>
@@ -15,7 +15,6 @@
   </ItemGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\Elastic.Clients.Elasticsearch.JsonNetSerializer\Elastic.Clients.Elasticsearch.JsonNetSerializer.csproj" />
     <ProjectReference Include="..\Elastic.Clients.Elasticsearch.Serverless\Elastic.Clients.Elasticsearch.Serverless.csproj" />
     <ProjectReference Include="..\Elastic.Clients.Elasticsearch\Elastic.Clients.Elasticsearch.csproj" />
   </ItemGroup>