remove the version override (Azure#49871)

Author: ArcturusZhang

sdk/cloudmachine/Azure.Projects.AI.Foundry/Azure.Projects.AI.Foundry.csproj

@@ -10,7 +10,7 @@
     <PackageReference Include="Azure.AI.Projects" />
     <PackageReference Include="Azure.Identity" />
     <PackageReference Include="Azure.Provisioning" />
-    <PackageReference Include="System.ClientModel" VersionOverride="1.4.0-beta.1" />
+    <PackageReference Include="System.ClientModel" />
   </ItemGroup>
 
   <ItemGroup>