Remove SelfContained from .csproj

So the project can build without specifying a RID.

Author: eerhardt

projects/AotCompatibility.TestApp/AotCompatibility.TestApp.csproj

@@ -6,7 +6,6 @@
     <ImplicitUsings>enable</ImplicitUsings>
     <!-- When targeting net7.0+, this can be updated to PublishAot. -->
     <PublishTrimmed>true</PublishTrimmed>
-    <SelfContained>true</SelfContained>
     <TrimmerSingleWarn>false</TrimmerSingleWarn>
   </PropertyGroup>