Revert "Merge pull request #841 from SpudGunMan/master"

This reverts commit b466225, reversing
changes made to 2065598.

Author: ianmcorvidae

meshtastic/serial_interface.py

@@ -94,16 +94,10 @@ def __repr__(self):
 
     def close(self) -> None:
         """Close a connection to the device"""
-        if hasattr(self, "stream") and self.stream and getattr(self.stream, "is_open", False):
-            try:
-                self.stream.flush()
-                time.sleep(0.1)
-            except Exception as e:
-                logger.debug(f"Exception during flush: {e}")
-            try:
-                self.stream.close()
-            except Exception as e:
-                logger.debug(f"Exception during close: {e}")
-            self.stream = None
+        if self.stream:  # Stream can be null if we were already closed
+            self.stream.flush()  # FIXME: why are there these  two flushes with 100ms sleeps?  This shouldn't be necessary
+            time.sleep(0.1)
+            self.stream.flush()
+            time.sleep(0.1)
         logger.debug("Closing Serial stream")
         StreamInterface.close(self)