Revert "Cancel incomplete BLE connection when CloseAllBleConnections(…

…) is called (#27304)" (#28143)

This reverts commit ad5403e.

There are two issues:

* #27607 which has had no
  response for weeks.
* #28139 which breaks
  commissioning on Mac, and would break it on Linux if it implemented BLE
  connection cancellation.

We need to sort out why CHIPDeviceController is canceling BLE connections when
starting PASE over BLE (!).

src/ble/BleLayer.cpp

@@ -308,13 +308,6 @@ void BleLayer::Shutdown()
 
 void BleLayer::CloseAllBleConnections()
 {
-    // Cancel any ongoing attempt to establish new BLE connection
-    CHIP_ERROR err = CancelBleIncompleteConnection();
-    if (err != CHIP_NO_ERROR)
-    {
-        ChipLogError(Ble, "CancelBleIncompleteConnection() failed, err = %" CHIP_ERROR_FORMAT, err.Format());
-    }
-
     // Close and free all BLE end points.
     for (size_t i = 0; i < BLE_LAYER_NUM_BLE_ENDPOINTS; i++)
     {