staging: rtl8188eu: remove unnecessary logging

This commit fixes the following checkpatch.pl issues:

+               pr_debug("===> %s\n", __func__);

WARNING: Unnecessary ftrace-like logging - prefer using ftrace
158: FILE: drivers/staging/rtl8188eu/os_dep/usb_intf.c:158:

WARNING: Unnecessary ftrace-like logging - prefer using ftrace
177: FILE: drivers/staging/rtl8188eu/os_dep/usb_intf.c:177:
+       pr_debug("<=== %s\n", __func__);

and removes another line of unnecessary logging, which was not
identified by checkpatch.pl in an automated manner.

Signed-off-by: Jan Gruber <j4n6ru@gmail.com>
Link: https://lore.kernel.org/r/20210705172101.239899-1-j4n6ru@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/os_dep/usb_intf.c

@@ -155,7 +155,6 @@ void usb_intf_stop(struct adapter *padapter)
 static void rtw_dev_unload(struct adapter *padapter)
 {
 	if (padapter->bup) {
-		pr_debug("===> %s\n", __func__);
 		padapter->bDriverStopped = true;
 		if (padapter->xmitpriv.ack_tx)
 			rtw_ack_tx_done(&padapter->xmitpriv, RTW_SCTX_DONE_DRV_STOP);
@@ -173,8 +172,6 @@ static void rtw_dev_unload(struct adapter *padapter)
 
 		padapter->bup = false;
 	}
-
-	pr_debug("<=== %s\n", __func__);
 }
 
 static int rtw_suspend(struct usb_interface *pusb_intf, pm_message_t message)
@@ -454,8 +451,6 @@ static void rtw_dev_remove(struct usb_interface *pusb_intf)
 	struct dvobj_priv *dvobj = usb_get_intfdata(pusb_intf);
 	struct adapter *padapter = dvobj->if1;
 
-	pr_debug("+%s\n", __func__);
-
 	if (!pusb_intf->unregistering)
 		padapter->bSurpriseRemoved = true;