fix: Fix default for tokenserver-db

Author: Eragonfr

Cargo.lock

@@ -34,6 +34,6 @@ env_logger.workspace = true
 syncserver-settings = { path = "../syncserver-settings" }
 
 [features]
-default = ["mysql"]
+default = []
 mysql = ["tokenserver-db-mysql"]
 sqlite = ["tokenserver-db-sqlite"]