refactor: remove runtime_bootstrap module and related initialization

Author: Soulter

main.py

@@ -5,10 +5,6 @@
 import sys
 from pathlib import Path
 
-import runtime_bootstrap
-
-runtime_bootstrap.initialize_runtime_bootstrap()
-
 from astrbot.core import LogBroker, LogManager, db_helper, logger  # noqa: E402
 from astrbot.core.config.default import VERSION  # noqa: E402
 from astrbot.core.initial_loader import InitialLoader  # noqa: E402