diff --git a/lib/Ebook.php b/lib/Ebook.php
index 59c60466..58f563c6 100644
--- a/lib/Ebook.php
+++ b/lib/Ebook.php
@@ -8,7 +8,6 @@ use function Safe\preg_match;
 use function Safe\preg_replace;
 use function Safe\sprintf;
 use function Safe\shell_exec;
-use function Safe\substr;
 
 /**
  * @property array<GitCommit> $GitCommits
diff --git a/lib/HttpInput.php b/lib/HttpInput.php
index 1788a3b9..1d5210a3 100644
--- a/lib/HttpInput.php
+++ b/lib/HttpInput.php
@@ -1,7 +1,6 @@
 <?
 use function Safe\ini_get;
 use function Safe\preg_match;
-use function Safe\substr;
 
 class HttpInput{
 	public static function RequestMethod(): int{
diff --git a/lib/Log.php b/lib/Log.php
index 48c81113..6aa11194 100644
--- a/lib/Log.php
+++ b/lib/Log.php
@@ -4,7 +4,6 @@ use function Safe\fopen;
 use function Safe\fwrite;
 use function Safe\fclose;
 use function Safe\error_log;
-use function Safe\substr;
 
 class Log{
 	private string $RequestId;
diff --git a/www/webhooks/github.php b/www/webhooks/github.php
index 9d26a1b8..0b46dffc 100644
--- a/www/webhooks/github.php
+++ b/www/webhooks/github.php
@@ -1,8 +1,6 @@
 <?
 use function Safe\exec;
-use function Safe\substr;
 use function Safe\file_get_contents;
-use function Safe\preg_replace;
 use function Safe\json_decode;
 use function Safe\glob;
 use function Safe\shell_exec;
diff --git a/www/webhooks/postmark.php b/www/webhooks/postmark.php
index c2e2462a..3a433c42 100644
--- a/www/webhooks/postmark.php
+++ b/www/webhooks/postmark.php
@@ -4,7 +4,6 @@ use function Safe\curl_init;
 use function Safe\curl_setopt;
 use function Safe\file_get_contents;
 use function Safe\json_decode;
-use function Safe\substr;
 
 $log = new Log(POSTMARK_WEBHOOK_LOG_FILE_PATH);