Remove unused _prep_query() method
diff --git a/system/database/drivers/sqlite3/sqlite3_driver.php b/system/database/drivers/sqlite3/sqlite3_driver.php
index ed08110..a3f5191 100644
--- a/system/database/drivers/sqlite3/sqlite3_driver.php
+++ b/system/database/drivers/sqlite3/sqlite3_driver.php
@@ -155,21 +155,6 @@
 	// --------------------------------------------------------------------
 
 	/**
-	 * Prep the query
-	 *
-	 * If needed, each database adapter can prep the query string
-	 *
-	 * @param	string	an SQL query
-	 * @return	string
-	 */
-	protected function _prep_query($sql)
-	{
-		return $sql;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
 	 * Begin Transaction
 	 *
 	 * @return	bool
@@ -561,4 +546,4 @@
 }
 
 /* End of file sqlite3_driver.php */
-/* Location: ./system/database/drivers/sqlite3/sqlite3_driver.php */
+/* Location: ./system/database/drivers/sqlite3/sqlite3_driver.php */
\ No newline at end of file