removed holding_deep_sleep_lock declaration from class CyH4TransportDriver:public CordioHCITransportDriver.

Author: nazar.palamar

connectivity/drivers/ble/FEATURE_BLE/COMPONENT_CYW43XXX/CyH4TransportDriver.h

@@ -123,8 +123,6 @@ class CyH4TransportDriver : public CordioHCITransportDriver {
     bool     enabled_powersave;
     uint8_t  host_wake_irq_event;
     uint8_t  dev_wake_irq_event;
-
-    bool     holding_deep_sleep_lock;
 };
 
 } // namespace cypress