diff --git a/core/database.php b/core/database.php
index e4ee55d1..63d05040 100644
--- a/core/database.php
+++ b/core/database.php
@@ -111,19 +111,6 @@ class Database
         return $this->engine->scoreql_to_sql($input);
     }
 
-    public function scoresql_value_prepare($input)
-    {
-        if (is_null($this->engine)) {
-            $this->connect_engine();
-        }
-        if ($input===true) {
-            return $this->engine->BOOL_Y;
-        } elseif ($input===false) {
-            return $this->engine->BOOL_N;
-        }
-        return $input;
-    }
-
     public function get_driver_name(): string
     {
         if (is_null($this->engine)) {