Added GetMinutesAsSeconds method

Removed magic number

Libraries/SPTarkov.Server.Core/Controllers/GameController.cs

@@ -365,7 +365,7 @@ public class GameController(
                 if (effect.Time < 1)
                 {
                     // More than 30 minutes has passed
-                    if (diffSeconds > 1800)
+                    if (diffSeconds > timeUtil.GetMinutesAsSeconds(30))
                     {
                         bodyPart.Effects.Remove(effectId);
                     }

Libraries/SPTarkov.Server.Core/Utils/TimeUtil.cs

@@ -156,4 +156,14 @@ public class TimeUtil
     {
         return seconds * 60 * 1000;
     }
+
+    /// <summary>
+    /// Get passed in minutes as seconds
+    /// </summary>
+    /// <param name="minutes">Minutes</param>
+    /// <returns>Seconds</returns>
+    public double GetMinutesAsSeconds(int minutes)
+    {
+        return minutes * 60;
+    }
 }