diff --git a/system/misc.php b/system/misc.php
deleted file mode 100644
index dfbf86d..0000000
--- a/system/misc.php
+++ /dev/null
@@ -1,50 +0,0 @@
-<?php
-/**
- * @file misc.php
- * @date 2018-04-13
- * @author Go Namhyeon <gnh1201@gmail.com>
- * @brief Misc module
- */
-
-if(!function_exists("cut_str")) {
-	function cut_str($str, $start, $len=0) {
-		$cutted_str = "";
-		if(function_exists("iconv_substr")) {
-			$cutted_str = iconv_substr($str, $start, $len, "utf-8");
-		} elseif(function_exists("mb_substr")) {
-			$cutted_str = mb_substr($str, $start, $len);
-		} else {
-			$cutted_str = substr($start, $len);
-		}
-		
-		return $cutted_str;
-	}
-}
-
-if(!function_exists("read_file_by_line")) {
-	function read_file_by_line($filename) {
-		$lines = array();
-		$handle = fopen($filename, "r");
-		if ($handle) {
-			while (($line = fgets($handle)) !== false) {
-				$lines[] .= $line;
-			}
-
-			fclose($handle);
-		}
-		
-		return $lines;
-	}
-}
-
-if(!function_exists("nl2p")) {
-	function nl2p($string) {
-		$paragraphs = '';
-		foreach (explode("\n", $string) as $line) {
-			if (trim($line)) {
-				$paragraphs .= '<p>' . $line . '</p>';
-			}
-		}
-		return $paragraphs;
-	}
-}