Remove obsolete vs-extension package overrides

Co-authored-by: timotheeguerin <1031227+timotheeguerin@users.noreply.github.com>

Author: Copilot

packages/typespec-vs/src/Microsoft.TypeSpec.VS.csproj

@@ -31,10 +31,6 @@
       Link="TextMate/typespec.tmLanguage" />
     <Content Update="@(Content)" IncludeInVSIX="true" CopyToOutputDirectory="PreserveNewest" />
     <Reference Include="System.ComponentModel.Composition" />
-    <!-- The 'MessagePack' is not used directly but referenced by nuget package 'Microsoft.VisualStudio.SDK', 'Microsoft.VisualStudio.Workspace' and 'Microsoft.VisualStudio.VSIntegration' -->
-    <!-- Have to add it explicitly here because the version used by 'Microsoft.VisualStudio...' report vulnerabilities now -->
-    <!-- TODO: [#5368] remove this explicit reference after 'Microsoft.VisualStudio...' releases new version having 'MessagePack' updated to vulnerability free version-->
-    <PackageReference Include="MessagePack" Version="2.5.192" />
     <PackageReference Include="Microsoft.NETFramework.ReferenceAssemblies" Version="1.0.2" />
     <Content Include="Icons\logo.png">
       <CopyToOutputDirectory>Always</CopyToOutputDirectory>
@@ -47,16 +43,8 @@
     </Content>
   </ItemGroup>
   <ItemGroup>
-    <!-- The 'Microsoft.VisualStudio.Composition' is not used directly but referenced by nuget package 'Microsoft.VisualStudio.Workspace' -->
-    <!-- Have to add it explicitly here because otherwise 'Microsoft.VisualStudio.Workspace" will report warning NU1603 because its desired version not found and higher version will be used -->
-    <!-- TODO: [#5368] remove this explicit reference after 'Microsoft.VisualStudio...' releases new version without the warning-->
-    <PackageReference Include="Microsoft.VisualStudio.Composition" Version="17.13.41" />
     <!-- Use 17.0.x or latest 16.x if no 17.0.x for compatible API-->
     <PackageReference Include="Microsoft.VisualStudio.SDK" Version="17.14.40265" ExcludeAssets="Runtime" />
-    <!-- The 'Microsoft.VisualStudio.Shell.15.0' is not used directly but referenced by nuget package 'Microsoft.VisualStudio.Workspace.VSIntegration' -->
-    <!-- Have to add it explicitly here because otherwise 'Microsoft.VisualStudio.Workspace.VSIntegration" will report warning NU1603 because its desired version not found and higher version will be used -->
-    <!-- TODO: [#5368] remove this explicit reference after 'Microsoft.VisualStudio...' releases new version without the warning-->
-    <PackageReference Include="Microsoft.VisualStudio.Shell.15.0" Version="17.14.40264" />
     <PackageReference Include="Microsoft.VisualStudio.Workspace" Version="17.12.19" ExcludeAssets="Runtime" />
     <PackageReference Include="Microsoft.VisualStudio.Workspace.VSIntegration" Version="17.12.19" ExcludeAssets="Runtime" />
     <!-- https://github.com/advisories/GHSA-w3q9-fxm7-j8fq -->