Remove redundant patch drupal/smart_date

patches/d9.json

@@ -135,9 +135,6 @@
       "#3079918 Fix symbolic links": "https://www.drupal.org/files/issues/2019-09-08/3079918-2.security_review.File-permission-test-returns-false-positives-when-symbolic-links-are-involved.patch",
       "#3094916 Check for Views UI": "https://www.drupal.org/files/issues/2019-11-17/3094916-2.security_review.ViewsAccess-plugin-needs-to-verify-that-viewsui-is-activated.patch"
     },
-    "drupal/smart_date": {
-      "#3252848 Avoid missing variables": "https://git.drupalcode.org/project/smart_date/-/merge_requests/15.diff"
-    },
     "drupal/smart_login": {
       "#2831386 Error 403 redirect": "https://www.drupal.org/files/issues/this_is_silently-2831386-2.patch",
       "#2709529 Redirect after login": "https://www.drupal.org/files/issues/redirect_to_page_of-2709529-2.patch",