fix : Delete unnecessary code

src/main/kotlin/com/flo/nem12/config/DatabaseConfig.kt

@@ -9,9 +9,6 @@ object DatabaseConfig {
      */
     const val DEFAULT_BATCH_SIZE = 50
 
-    /**
-     * SQLite meter_readings table schema
-     */
     const val CREATE_TABLE_SQL = """
         CREATE TABLE IF NOT EXISTS meter_readings (
             id TEXT PRIMARY KEY,
@@ -22,22 +19,13 @@ object DatabaseConfig {
         )
     """
 
-    /**
-     * Insert statement with conflict handling (IGNORE duplicates)
-     */
     const val INSERT_SQL = """
         INSERT OR IGNORE INTO meter_readings (id, nmi, timestamp, consumption)
         VALUES (?, ?, ?, ?)
     """
 
-    /**
-     * Timestamp format used in database
-     */
     const val TIMESTAMP_FORMAT = "yyyy-MM-dd HH:mm:ss"
 
-    /**
-     * SQLite failed_readings table schema
-     */
     const val CREATE_FAILED_READINGS_TABLE_SQL = """
         CREATE TABLE IF NOT EXISTS failed_readings (
             id TEXT PRIMARY KEY,
@@ -50,9 +38,6 @@ object DatabaseConfig {
         )
     """
 
-    /**
-     * Insert statement for failed readings
-     */
     const val INSERT_FAILED_READING_SQL = """
         INSERT INTO failed_readings (id, line_number, nmi, interval_index, raw_value, failure_reason, timestamp)
         VALUES (?, ?, ?, ?, ?, ?, ?)

src/main/kotlin/com/flo/nem12/util/DateTimeValidator.kt

@@ -14,12 +14,6 @@ object DateTimeValidator {
      */
     private val ISO8601_DATETIME_FORMATTER = DateTimeFormatter.ofPattern("yyyyMMddHHmm")
 
-    /**
-     * ISO8601 Date format: YYYYMMDD (8 characters)
-     * Example: 20050301 = 2005-03-01
-     */
-    private val ISO8601_DATE_FORMATTER = DateTimeFormatter.ofPattern("yyyyMMdd")
-
     /**
      * Validates ISO8601 DateTime format (12 characters: YYYYMMDDHHmm)
      *
@@ -37,47 +31,4 @@ object DateTimeValidator {
             false
         }
     }
-
-    /**
-     * Validates ISO8601 Date format (8 characters: YYYYMMDD)
-     *
-     * @param dateStr Date string to validate
-     * @return true if valid, false otherwise
-     */
-    fun isValidISO8601Date(dateStr: String): Boolean {
-        if (dateStr.length != 8) return false
-        if (!dateStr.all { it.isDigit() }) return false
-
-        return try {
-            ISO8601_DATE_FORMATTER.parse(dateStr)
-            true
-        } catch (e: DateTimeParseException) {
-            false
-        }
-    }
-
-    /**
-     * Parses ISO8601 DateTime string to LocalDateTime
-     *
-     * @param dateTimeStr DateTime string in YYYYMMDDHHmm format
-     * @return LocalDateTime object
-     * @throws DateTimeParseException if format is invalid
-     */
-    fun parseISO8601DateTime(dateTimeStr: String): LocalDateTime {
-        require(dateTimeStr.length == 12) { "DateTime must be 12 characters (YYYYMMDDHHmm)" }
-        return LocalDateTime.parse(dateTimeStr, ISO8601_DATETIME_FORMATTER)
-    }
-
-    /**
-     * Parses ISO8601 Date string
-     *
-     * @param dateStr Date string in YYYYMMDD format
-     * @return Formatted date string
-     * @throws DateTimeParseException if format is invalid
-     */
-    fun parseISO8601Date(dateStr: String): String {
-        require(dateStr.length == 8) { "Date must be 8 characters (YYYYMMDD)" }
-        ISO8601_DATE_FORMATTER.parse(dateStr)
-        return dateStr
-    }
 }