Stop building, testing deprecated Key Vault track 1 (Azure#24595)

Author: heaths

sdk/keyvault/service.projects

@@ -1,6 +1,6 @@
 <Project>
   <ItemGroup>
-    <!-- Remove data plane tests from nightly live runs: https://github.com/Azure/azure-sdk-for-net/issues/13029 -->
-    <ProjectReference Remove="$(MSBuildThisFileDirectory)Microsoft.Azure.*\**\*.csproj" Condition="'$(AZURE_KEYVAULT_TEST_MODE)' == 'Live'" />
+    <!-- Remove deprecated track 1 packages from builds and live testing. -->
+    <ProjectReference Remove="$(MSBuildThisFileDirectory)Microsoft.Azure.*\**\*.csproj" />
   </ItemGroup>
 </Project>