NO-SNOW: Removed unused flag

Author: sfc-gh-fpawlowski

src/snowflake/connector/aio/_connection.py

@@ -134,7 +134,6 @@ def __init__(
         if "platform_detection_timeout_seconds" not in kwargs:
             self._platform_detection_timeout_seconds = 0.0
 
-        self._connected = False
         self.expired = False
         # check SNOW-1218851 for long term improvement plan to refactor ocsp code
         atexit.register(self._close_at_exit)