Clear list of OOB packages built on 6.0 (#62610)

* Clear list of OOB packages built on 6.0

* Bump System.Text.Json servicing version to 2

Author: safern

src/libraries/Microsoft.Extensions.HostFactoryResolver/src/Microsoft.Extensions.HostFactoryResolver.Sources.csproj

@@ -9,7 +9,6 @@
     <IsSourcePackage>true</IsSourcePackage>
     <!-- This is non-shipping package. -->
     <DisablePackageBaselineValidation>true</DisablePackageBaselineValidation>
-    <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <ServicingVersion>1</ServicingVersion>
     <PackageDescription>Internal package for sharing Microsoft.Extensions.Hosting.HostFactoryResolver type.</PackageDescription>
   </PropertyGroup>

src/libraries/Microsoft.NETCore.Platforms/src/Microsoft.NETCore.Platforms.csproj

@@ -19,7 +19,6 @@
 
     <!-- When building from source, ensure the RID we're building for is part of the RID graph -->
     <AdditionalRuntimeIdentifiers Condition="'$(DotNetBuildFromSource)' == 'true'">$(AdditionalRuntimeIdentifiers);$(OutputRID)</AdditionalRuntimeIdentifiers>
-    <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <ServicingVersion>1</ServicingVersion>
   </PropertyGroup>
 

src/libraries/System.IO.Pipelines/src/System.IO.Pipelines.csproj

@@ -9,7 +9,6 @@ Commonly Used Types:
 System.IO.Pipelines.Pipe
 System.IO.Pipelines.PipeWriter
 System.IO.Pipelines.PipeReader</PackageDescription>
-    <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <ServicingVersion>1</ServicingVersion>
   </PropertyGroup>
   <ItemGroup>

src/libraries/System.Text.Json/src/System.Text.Json.csproj

@@ -10,7 +10,7 @@
     <IncludeInternalObsoleteAttribute>true</IncludeInternalObsoleteAttribute>
     <IsPackable>true</IsPackable>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
-    <ServicingVersion>1</ServicingVersion>
+    <ServicingVersion>2</ServicingVersion>
     <PackageDescription>Provides high-performance and low-allocating types that serialize objects to JavaScript Object Notation (JSON) text and deserialize JSON text to objects, with UTF-8 support built-in. Also provides types to read and write JSON text encoded as UTF-8, and to create an in-memory document object model (DOM), that is read-only, for random access of the JSON elements within a structured view of the data.
 
 Commonly Used Types: