Remove deprecation banner for 3.14 versioned documentation pages (#56999)

Author: pallsama

src/ghes-releases/lib/enterprise-dates.json

@@ -153,7 +153,7 @@
   },
   "3.14": {
     "releaseDate": "2024-08-06",
-    "deprecationDate": "2025-08-27"
+    "deprecationDate": "2026-01-27"
   },
   "3.15": {
     "releaseDate": "2024-11-12",
@@ -191,4 +191,4 @@
     "releaseDate": "2026-11-10",
     "deprecationDate": "2027-12-08"
   }
-}
+}