Remove trailing commas from MHDB (#8597)

Author: Marinovsky

Data/market-hours/market-hours-database.json

@@ -927,7 +927,7 @@
         "12/26/2022",
         "12/25/2023",
         "12/25/2024",
-        "12/25/2025",
+        "12/25/2025"
       ],
       "earlyCloses": {},
       "lateOpens": {}
@@ -74359,7 +74359,7 @@
       "holidays": [
         "4/3/2015",
         "4/2/2021",
-        "4/18/2025",
+        "4/18/2025"
       ],
       "earlyCloses": {
         "12/31/2010": "12:15:00",