staging: rtl8188eu: remove RTL871X_HCI_TYPE enum

This enum is not used and can be removed.
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20210718173610.894-3-martin@kaiser.cxSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/include/hal_intf.h

@@ -11,13 +11,6 @@
 #include <drv_types.h>
 #include <hal8188e_phy_cfg.h>
 
-enum RTL871X_HCI_TYPE {
-	RTW_PCIE	= BIT(0),
-	RTW_USB		= BIT(1),
-	RTW_SDIO	= BIT(2),
-	RTW_GSPI	= BIT(3),
-};
-
 enum _CHIP_TYPE {
 	NULL_CHIP_TYPE,
 	RTL8712_8188S_8191S_8192S,