staging: r8188eu: drop redundant check in _rtw_free_mlme_priv

There's a NULL check on pmlmepriv in rtw_mlme.c:112 which makes no sense
as rtw_free_mlme_priv_ie_data() dereferences it unconditionally and it
would have already crashed at this point.
Remove this redundant check.

Signed-off-by: Vihas Makwana <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/r8188eu/core/rtw_mlme.c

···
 void rtw_free_mlme_priv(struct mlme_priv *pmlmepriv)
 {
 	rtw_free_mlme_priv_ie_data(pmlmepriv);
-
-	if (pmlmepriv)
-		vfree(pmlmepriv->free_bss_buf);
+	vfree(pmlmepriv->free_bss_buf);
 }
 
 struct wlan_network *rtw_alloc_network(struct mlme_priv *pmlmepriv)