staging: r8188eu: struct usb_suspend_parm is not used

struct usb_suspend_parm is not used. Remove it.
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220216081657.622467-4-martin@kaiser.cxSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/include/rtw_cmd.h

@@ -122,18 +122,6 @@ enum RFINTFS {
 	HWPI,
 };
 
-/*
-Caller Mode: Infra, Ad-HoC(C)
-
-Notes: To enter USB suspend mode
-
-Command Mode
-
-*/
-struct usb_suspend_parm {
-	u32 action;/*  1: sleep, 0:resume */
-};
-
 /*
 Caller Mode: Infra, Ad-HoC