improve statistics

app/src/main/java/it/danieleverducci/lunatracker/entities/LunaEvent.kt

@@ -94,18 +94,6 @@ class LunaEvent: Comparable<LunaEvent> {
         this.quantity = quantity
     }
 
-    fun getStartTime(): Long {
-        return time
-    }
-
-    fun getEndTime(): Long {
-        return if (type == TYPE_SLEEP) {
-            time + quantity
-        } else {
-            time
-        }
-    }
-
     fun getTypeEmoji(context: Context): String {
         return context.getString(
             when (type) {