diff --git a/functions-debug.php b/functions-debug.php
deleted file mode 100644
index 1aeee65..0000000
--- a/functions-debug.php
+++ /dev/null
@@ -1,67 +0,0 @@
-<?php
-/*
- * Functions relative to debugging
- */
-
-/**
- * Add a message to the debug log
- *
- * When in debug mode ( YOURLS_DEBUG == true ) the debug log is echoed in yourls_html_footer()
- * Log messages are appended to $ydb->debug_log array, which is instanciated within class ezSQLcore_YOURLS
- *
- * @since 1.7
- * @param string $msg Message to add to the debug log
- * @return string The message itself
- */
-function yourls_debug_log( $msg ) {
-    yourls_do_action( 'debug_log', $msg );
-    // Get the DB object ($ydb), get its profiler (\Aura\Sql\Profiler\Profiler), its logger (\Aura\Sql\Profiler\MemoryLogger) and
-    // pass it a unused argument (loglevel) and the message
-    yourls_get_db()->getProfiler()->getLogger()->log( 'debug', $msg);
-    return $msg;
-}
-
-/**
- * Get the debug log
- *
- * @since  1.7.3
- * @return array
- */
-function yourls_get_debug_log() {
-    return yourls_get_db()->getProfiler()->getLogger()->getMessages();
-}
-
-/**
- * Get number of SQL queries performed
- *
- * @return int
- */
-function yourls_get_num_queries() {
-	return yourls_apply_filter( 'get_num_queries', yourls_get_db()->get_num_queries() );
-}
-
-/**
- * Debug mode set
- *
- * @since 1.7.3
- * @param bool $bool Debug on or off
- * @return void
- */
-function yourls_debug_mode( $bool ) {
-    // log queries if true
-    yourls_get_db()->getProfiler()->setActive( (bool)$bool );
-
-    // report notices if true
-    $level = $bool ? -1 : ( E_ERROR | E_PARSE );
-    error_reporting( $level );
-}
-
-/**
- * Return YOURLS debug mode
- *
- * @since 1.7.7
- * @return bool
- */
-function yourls_get_debug_mode() {
-    return defined( 'YOURLS_DEBUG' ) && YOURLS_DEBUG;
-}