TrimOOBAssemblies target shouldn't hardcode untrimmable assemblies

[ViktorHofer]

The TrimOOBAssemblies's dependent target currently hardcodes the list of untrimmable out-of-band assemblies:

runtime/src/libraries/oob.proj

Lines 48 to 59 in f0a7566

	<!-- The following is the list of all the OOBs we will ignore for now -->
	<OOBAssemblyToIgnore Include="System.CodeDom;
	System.ComponentModel.Composition;
	System.ComponentModel.Composition.Registration;
	System.Composition.AttributedModel;
	System.Composition.Convention;
	System.Composition.Hosting;
	System.Composition.Runtime;
	System.Composition.TypedParts;
	System.Configuration.ConfigurationManager;
	System.Speech;
	Microsoft.Extensions.DependencyInjection.Specification.Tests" />

This information is already provided by the projects themselves and should just be accessed by flowing it through the TargetPathWithTargetPlatformMoniker item. That static data isn't up-to-date already as System.ComponentModel.AttributedModel and System.Composition.Runtime are trimmable but were excluded from the validation.

Noticed this in https://github.com/dotnet/runtime/pull/71752/files#diff-c45d29e8d7bee20b15b64ce806983857a3e5899cbedc412e71cce4bd83a70323R58 which sets <IsTrimmable>false</IsTrimmable> in the project's body but also in the oob.proj file.

cc @eerhardt @joperezr @ericstj

[ghost]

Tagging subscribers to this area: @dotnet/area-infrastructure-libraries
See info in area-owners.md if you want to be subscribed.

Issue Details

---

The TrimOOBAssemblies's dependent target currently hardcodes the list of untrimmable out-of-band assemblies:

runtime/src/libraries/oob.proj

Lines 48 to 59 in f0a7566

	<!-- The following is the list of all the OOBs we will ignore for now -->
	<OOBAssemblyToIgnore Include="System.CodeDom;
	System.ComponentModel.Composition;
	System.ComponentModel.Composition.Registration;
	System.Composition.AttributedModel;
	System.Composition.Convention;
	System.Composition.Hosting;
	System.Composition.Runtime;
	System.Composition.TypedParts;
	System.Configuration.ConfigurationManager;
	System.Speech;
	Microsoft.Extensions.DependencyInjection.Specification.Tests" />

This information is already provided by the projects themselves and should just be accessed by flowing it through the TargetPathWithTargetPlatformMoniker item (similar to

runtime/eng/references.targets

Lines 71 to 75 in f0a7566

	<ItemDefinitionGroup>
	<TargetPathWithTargetPlatformMoniker>
	<IsReferenceAssemblyProject>$(IsReferenceAssemblyProject)</IsReferenceAssemblyProject>
	</TargetPathWithTargetPlatformMoniker>
	</ItemDefinitionGroup>

) so that the targets has access to the data.

cc @eerhardt @joperezr @ericstj

Author:	ViktorHofer
Assignees:	-
Labels:	area-Infrastructure-libraries
Milestone:	-