Revert "Update LastUpdated date for Packages when aggregating stats."
Revert "Update LastUpdated date for Packages when aggregating stats."

This reverts commit 8b1b77767cd4601d6de7b1f2ab954751186289f8.

KuduApps/NuGetGallery,mtian/SiteExtensionGallery,JetBrains/ReSharperGallery,skbkontur/NuGetGallery,skbkontur/NuGetGallery,KuduApps/NuGetGallery,KuduApps/NuGetGallery,grenade/NuGetGallery_download-count-patch,ScottShingler/NuGetGallery,skbkontur/NuGetGallery,grenade/NuGetGallery_download-count-patch,projectkudu/SiteExtensionGallery,mtian/SiteExtensionGallery,KuduApps/NuGetGallery,grenade/NuGetGallery_download-count-patch,JetBrains/ReSharperGallery,projectkudu/SiteExtensionGallery,ScottShingler/NuGetGallery,mtian/SiteExtensionGallery,JetBrains/ReSharperGallery,ScottShingler/NuGetGallery,projectkudu/SiteExtensionGallery,KuduApps/NuGetGallery