Remove dotnet9 nuget feeds (dotnet#109149)

All the dependencies are on the dotnet10 feeds now.

Fixes dotnet#106593

NuGet.config

@@ -17,9 +17,6 @@
     <add key="dotnet-eng" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-eng/nuget/v3/index.json" />
     <add key="dotnet-libraries" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-libraries/nuget/v3/index.json" />
     <add key="dotnet-libraries-transport" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-libraries-transport/nuget/v3/index.json" />
-    <!-- TODO: Remove dotnet9 feeds when all dependencies moved to the dotnet10 feeds. https://github.com/dotnet/runtime/issues/106593 -->
-    <add key="dotnet9" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet9/nuget/v3/index.json" />
-    <add key="dotnet9-transport" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet9-transport/nuget/v3/index.json" />
     <add key="dotnet10" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet10/nuget/v3/index.json" />
     <add key="dotnet10-transport" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet10-transport/nuget/v3/index.json" />
   </packageSources>

eng/Version.Details.xml

@@ -4,10 +4,6 @@
       <Uri>https://github.com/dotnet/icu</Uri>
       <Sha>fab86913c2513c26d997776758866c100ce986dc</Sha>
     </Dependency>
-    <Dependency Name="System.Net.MsQuic.Transport" Version="9.0.0-alpha.1.24167.3">
-      <Uri>https://github.com/dotnet/msquic</Uri>
-      <Sha>6281631a8328ffdbb1b63b231af1aaa803915b23</Sha>
-    </Dependency>
     <Dependency Name="System.ServiceModel.Primitives" Version="4.9.0-rc2.21473.1">
       <Uri>https://github.com/dotnet/wcf</Uri>
       <Sha>7f504aabb1988e9a093c1e74d8040bd52feb2f01</Sha>